Friendly Ball

Friendly Ball is an activated item added in Afterbirth.

Effect

 * Once thrown, the Friendly Ball will instantly capture any non-boss enemy, effectively killing them.
 * Then the trapped enemy can be released, now charmed, to fight alongside Isaac.
 * Released enemies persist between rooms and floors and will follow Isaac until they die.
 * Unlike typical charmed enemies, the released enemy cannot, in any way, harm Isaac.

Trivia

 * The item is a reference to Pokéballs from the Pokémon franchise.
 * Ironically, it doesn't at all resemble the actual Friend Ball in the franchise.

Seeds
3WOS NSB1 (Treasure room adjacent to spawn) MF7L HXQV (Treasure room adjacent to spawn) (Hard mode only)