Legal and copyright
Who owns what on this site, and how to reach us about it. Last updated November 2026.
Unofficial fan site
MasterThis is an independent, fan-made collection checklist. It is not produced by, sponsored by, endorsed by, or in any way officially connected with Nintendo, Creatures Inc., GAME FREAK inc., The Pokemon Company, The Pokemon Company International, Riot Games, Inc., Eiichiro Oda/Shueisha, Toei Animation, Bandai, TCGplayer, Inc., PriceCharting, Card Ladder, Collectr, ALT, PSA, TradePost, eBay, Amazon, Google, Discord, YouTube, X, Instagram, Facebook, Twitch or TikTok. No claim of ownership is made over any of their property.
Trademarks and copyrights
- Pokemon, Pokemon character names, Pokemon Trading Card Game, and all related names, logos, artwork and card designs, including Japanese-language printings and their Japanese product names and artwork, are trademarks and copyrights of Nintendo, Creatures Inc., GAME FREAK inc. and The Pokemon Company. Card images are displayed at reduced size solely to identify the card being tracked, which we believe is a fair use for a reference and checklist purpose. We do not sell, license or distribute the images.
- PSA and related names and marks belong to their respective owner. MasterThis is not affiliated with, sponsored by, or endorsed by PSA. Grades and certification numbers recorded here are supplied by users for collection tracking; MasterThis does not authenticate or guarantee graded items, and the grade badge is our own plain-text label, not a reproduction of any PSA label. PSA population, auction price search and certification links open PSA's own site. Population counts, auction results and certification results come from PSA, may require a PSA account, and are not stored or verified by us. PSA's search may return other printings; choose the matching set and printing. Use PSA's official certification tools when checking an item.
- Riftbound, League of Legends, their character names, logos, artwork and card designs are trademarks and copyrights of Riot Games, Inc. Riftbound card and product images are displayed at reduced size solely to identify the item being tracked. MasterThis is not endorsed by Riot Games and does not reflect the views or opinions of Riot Games or anyone officially involved in producing or managing Riot Games properties.
- One Piece, its character names, logos, artwork and card designs are trademarks and copyrights of Eiichiro Oda/Shueisha, Toei Animation and Bandai. One Piece Card Game card and product images are displayed at reduced size solely to identify the item being tracked. MasterThis is not produced, sponsored or endorsed by Bandai, Shueisha or Toei Animation.
- TCGplayer and the TCGplayer logo are trademarks of TCGplayer, Inc. Raw and sealed prices shown here are derived from TCGplayer's publicly available market data, including USD references for Japanese Pokemon printings, and price links go to the TCGplayer product page through our outbound redirect. Price data is provided for reference only and TCGplayer is not responsible for this site.
- Graded-card PSA 10 references for most printings come from PriceCharting under a subscription and are shown with a link to the source. PriceCharting is a trademark of its owner; MasterThis is not affiliated with PriceCharting.
- Comparison links to PriceCharting (pricecharting.com), Card Ladder (cardladder.com), Collectr (app.getcollectr.com), ALT (alt.xyz), eBay (ebay.com) and PSA (psacard.com) open those providers' own sites. TradePost (tradepost.co) offer links open TradePost's own site. Some need an account or subscription, their prices and terms can differ from ours, and a link is not an endorsement or a guarantee that a provider's listing matches this exact printing. We do not control and are not responsible for their content.
- TradePost and related names and marks belong to their respective owner. TradePost offer figures show the highest listed public bids for the exact product and condition, before fees and shipping. They are third-party references, not a price set by this site or our valuation, and any sale is under TradePost's terms. Offers can change; confirm the product, condition, quantity and fees on TradePost. MasterThis is not affiliated with or endorsed by TradePost.
- eBay and the eBay logo are trademarks of eBay Inc. Amazon and the Amazon logo are trademarks of Amazon.com, Inc. or its affiliates. Buying links to those retailers may be affiliate links, as described below, but MasterThis is not affiliated with or endorsed by either retailer. Affiliate links are a marketing arrangement, not a corporate affiliation.
- Google, YouTube, AdSense, Discord, X, Instagram, Facebook, Twitch and TikTok are trademarks of their respective owners. They identify sign-in providers, connected accounts, public-profile links and advertising on this site. Links to official Pokemon (pokemon.com), Riftbound (playriftbound.com) and One Piece (en.onepiece-cardgame.com) game and rules pages open those publishers' own sites. These links open third-party sites whose terms, privacy policies and content apply. MasterThis is not affiliated with or endorsed by those services.
- Pokemon sprites and artwork used in navigation are served from the PokeAPI sprite collection and remain the property of their respective owners.
- Pokemon card metadata (set, number, rarity, artist, card text) comes from the open pokemon-tcg-data project, used under its MIT license. Riftbound and One Piece card and product metadata, and Japanese Pokemon product details, come from TCGplayer's catalog data via tcgcsv.com; names and images remain the property of their respective owners.
Removal requests
If you are a rights holder, or an agent of one, and believe material on this site infringes your rights, email help@masterthis.app with the URL of the material, a description of the work you believe is infringed, your contact details, and a statement that you are authorized to act for the owner. We respond to valid notices promptly, normally by removing the material within a few business days. The same address handles privacy requests and account deletion questions.
User content
The only content users contribute is a handle, which cards they have marked as owned and how many copies, including Japanese Pokemon holdings, how many of each sealed product they own, the names and descriptions of any custom sets and decks they build, the cards and notes on their wishlists, the grades and certification numbers of graded copies they record, and any public profile links or connected account names they choose to show. Handles that use someone else's trademark or impersonate a person or company will be renamed or removed on request.
Advertising and affiliate links
This site may show advertising to cover hosting costs. Advertisements are provided by Google AdSense and do not imply endorsement by any rights holder named above.
Buying links on card and product pages may be affiliate links, including eBay (through the eBay Partner Network), TCGplayer and Amazon (through Amazon Associates). MasterThis may be compensated if you make a purchase after clicking them. This never changes the price you pay, does not influence which cards are listed or how prices are shown, and sellers are ordered by usefulness to you, not by commission. Market prices shown on the site are reference values from TCGplayer and may differ from what a seller charges.
Comparison links to PriceCharting, Card Ladder, Collectr, ALT and PSA are not affiliate links. eBay searches in the comparison panel may be affiliate links. TradePost offer links are not affiliate links.