SDGF robots, like the ones at Chuck E. Cheese. They could do them at a Comic-con, or Bot-con, or whatever con they'd fit in the best. Don't know how they'd do Zero, 'cause he'd have to hover, but it'd be REALLY cool to see a life-sized Gundam Force in action.
(No Shute. Human robots that look like humans are creepy enough. A human robot that looks like an anime character? (shudder)
(... maybe you could get away with Chief Haro, but I dunno.)
You'd probably have to mess with the bending joints a little to make them work the whole way. Elbows and shoulders would be tricky, 'cause they're all blocky and bunched up. And imagine if the eyes messed up. Baku stuck with one eye on dizzy and the other on surprised, (another shudder).
... on second thought, nevermind. Real life singing super-deformed Gundams would probably be the creepiest of creepy.