Trumpy

Trumpy, known as Rarapappa (ララパッパ) in the Japanese version, is a virus in the Mega Man Battle Network series that resemble a horn wearing headphones. They appear in later Mega Man Battle Network games starting with Mega Man Battle Network 3.

A Trumpy jumps up and down in the right-most column on the enemy's side, pausing after four jumps to play music that will affect either MegaMan or its allies. However, Trumpies don't benefit from their own music.

Trumpy
 Trumpy is a yellow variant. Their music makes its allies invincible.

Tuby
 Tuby is a blue variant. Their music confuses MegaMan. Moving up on the D-pad makes you move down, etc.

Tromby
 Tromby is a pink variant. Their music immobilizes MegaMan.

TrumpyΩ/MuteAnt
 MuteAnt is a grey variant. Their music makes MegaMan blind, similar to the Battle Chip Blinder.

Xylos
 Xylos is an orange variant. Their music recovers HP to its allies.

TrumpyEX/TrumpySP
 TrumpyEX is a green variant. Their music makes its allies invincible.

Battle Chips
Trumpies yield Fanfare battle chips when deleted. These chips summons a 100HP Trumpy virus (60HP in BN6) in front of MegaMan that causes different effects while playing. The Trumpy can be destroyed by enemy attacks. Like other chips that summon something, these can be placed on the enemies side too.

Fanfare
A yellow Trumpy is summoned. When it plays, MegaMan is invincible to attacks. The Trumpy is still vulnerable, though.

Discord
A cyan Trumpy appears and causes enemies to become confused for the duration of its song.

Timpani
A pink Trumpy is summoned, whose song immobilizes enemies while it plays.

Silence
A gray Trumpy appears and makes enemies blind. They can still attack though, however their hit rate is decreased.

Dark Sonic
Dark Sonic is a Dark Chip only found in Battle Network 5. When used, it summons a purple Trumpy with 100HP whose music paralyzes all enemies. Other than the health penalty caused by using Dark Chips, a bug occurs that causes MegaMan to instantly teleport to the edge of his side of the field.