@Reno: There are no hard and fast limits, per se. Turn A is a whole other type of mess, one that I'd prefer not to deal with, but it can be discussed if needed. Off the top of my head I can't think of anything I outright wouldn't allow, but there are probably suits that'd need some discussion.

@Crimmy: Reno has it more or less correct. 'Gundam' as a definition varies from series to series, but basically, if it's a unique suit, it's probably not allowed at start. If it was used by a protagonist, it's almost certainly not allowed. If you have a specific query, you can ask about a specific suit.

Approval for suits is largely on a case by case basis, as the lines of what is and isn't a Gundam blurs sometimes.