Focus Band 86/111 (1st Edition)
Set:
Neo Genesis
Description
Trainer - Pokémon Tool
Attach Focus Band to 1 of your Pokémon that doesn't have a Pokémon Tool attached to it.
If the Pokémon Focus Band is attached to would be Knocked Out by your opponent's attack, flip a coin. If heads, that Pokémon is not Knocked Out and its remaining HP become 10 instead. Then, discard Focus Band.