• English / United States: Peg
• Japanese / Japan: プルーフ
• Japanese (Romanized) / Japan: Proof
• Japanese (TL) / Japan: Proof

Proof is a fan of the Pokémon Backer team Tengan Fighters who was playing in the Pokémon Backer World Cup at Crown City. She was in Crown City to see a match when what she thought was Suicune left a waterfall of water behind her and she had to climb up a light post to avoid what she thought would be drowning. Zoroark was actually the Suicune she saw using its Illusion ability.