I have amassed quite a few weapons for fusing in Kid Icarus Uprising. Is there a limit to the amount of weapons you can have? Like will some of the weapons disappear if there is too many?
There is no limit to the number of weapons you can have. Players have reached count of 1000s or even 10,000 weapons, without loosing a single one.
However, it's better to look into weapon fusion than just going "gotta have 'em all" on the weapons ;)