They're fried food, and appear in the same room as the teleportation pods from David Cronenberg's version of The Fly. The Fly,The Fry...
Why does Bert need the help of an ordinary kid with a baseball bat when he's a gargoyle who can fly and shoot Eye Beams and is better than Mark in every way?
Bert can't send projectiles back at the bosses. Only Mark can. Makes about as much sense as anything else in this game!