Bumbino

Bumbino is a boss added in The Binding of Isaac: Repentance that can appear in all environments of Chapter 2.

Behavior
Bumbino slowly moves towards Isaac and can perform the following attacks:
 * Swipes forward to clear a path to Isaac if Bumbino is obstructed by obstacles while chasing him.
 * Performs two swipes, one in Isaac's direction, followed by another swipe in the opposite direction; these swipes can break obstacles. Then slams the ground, releasing 8 rock projectiles in all directions as well as 4 rock waves diagonally.
 * If Bumbino hits a wall with a swipe he is momentarily stunned, interrupting this attack and causing rock projectiles to fall from the ceiling.
 * Charges in Isaac's direction when vertically aligned with him and a wall, Bumbino will become stunned when impacting the wall, launching a cluster of rock projectiles in the opposite direction and causes rock projectiles to fall from the ceiling.
 * If Isaac is close to the impact he is pushed away.
 * Launches a Bomb in Isaac's direction.

All of Bumbino's attacks deal 1 Heart of damage.

Additionally, Bumbino attempts to pick up any dropped Coins, similar to Ultra Greed but without the healing.
 * He prioritizes picking up Coins on the ground over attacking.
 * He cannot pick up Sticky Nickels, but will try indefinitely if one should spawn in the room, effectively anchoring him to one spot.
 * Getting hit by Bumbino's swipes may sometimes cause Isaac to drop Coins.
 * Isaac will still drop coins if immune to damage via the.
 * If Bumbino swipes the skeleton of, coins will be dropped without taking damage.
 * If Bumbino picks up 12 cents worth of coins, he drops an extra item from the following list and then leaves the room:

Trivia

 * Bumbino is based on, an item in-game and the main character in The Legend of Bum-bo, another game developed by Edmund McMillen in 2019.
 * All items dropped by Bumbino reference the gameplay symbols from The Legend of Bum-bo: Pee, Poop, Hearts, Bones and Snot, with the only symbol missing being Teeth.
 * The name "Bumbino" is a portmanteau of "Bumbo" and "Bambino", the Italian word for child.
 * Bumbino's slam attack may be a reference to the Wario Land games, as he slams with his shoulder forward, mimicking Wario's Shoulder Bash move.
 * Bumbino's voice is noticably deeper pitched than Bumbo's from The Legend of Bum-bo, despite resembling him.