>>24934632Altered cards are cards someone painted over to extend the art or sometimes give it entirely new art. It's very popular with Magic cards but there are some artists who paint on cards from other games.
I've only come across two people who do great Pokémon alters, though. Since Pokémon has not a lot of formats, old cards are pretty much worthless to players whereas in other games they get used in tons of decks or in cubes.
