"This move selects and uses a random move known by a Pokémon within your party. However, it cannot use the moves; Assist, Chatter, Circle Throw, Copycat, Counter, Covet, Destiny Bond, Detect, Dragon Tail, Endure, Feint, Focus Punch, Follow Me, Helping Hand, Me First, Metronome, Mimic, Mirror Coat, Mirror Move, Protect, Quick Guard, Sketch, Sleep Talk, Snatch, Struggle, Switcheroo, Thief, Trick, or Wide Guard" - serebii.net
Edit: https://www.smogon.com/dex/ss/moves/assist/ > also has a list that is probably more accurate
Do you see Eruption on this list?