MECHAPIÑATA

Pinata + Servomotor = Swirling-one-way pinata
Swirling-one-way pinata + Servomotor = Rearing-up pinata
Rearing-up pinata + Servomotor = Wobbly pinata
Wobbly Pinata + Servomotor = Robo-Pinata
Robo-Pinata + Guidance system = Passive pinata
Passive Pinata + Laser cannon = Assault pinata
Assault Pinata + Reinforced harness = Saddled assault pinata
Fusion pack + Fusion pack = Unstable power pack
Unstable power pack + Saddled assault pinata = Fully-powered pinata
Fully-powered pinata + Embiggening tonic = MECHAPIÑATA
MECHAPIÑATA + amulet of corruption = EATER OF SOULS
EATER OF SOULS + jetpack = Cristiona

Shopping List

4x Rave flyer
4x Transformer
4x Gears
4x Pressure plate
4x Electronic cabling
2x Fusion pack
2x Trylon strap
1x Solder
1x Plasteel plating
1x Firecracker
1x Digital saber
1x Broken PDA
1x Memory tube
1x Nanoprocessor
1x Signal processing code
1x Physiology scan code
1x Laser cannon
1x Embiggening tonic

Notes

The MECHAPIÑATA was originally intended to be a form of transportation, but was disabled for being "too silly". It and all its intermediate steps were removed from the database before the recipe was widely known.