Im thinkin about puttin a gba sp into a original agmeboy(ish) style case, and a custom aint job(one thing this noob actually can do) so after finding just the right spare plastic would the hot glue hold it together OK
Hot glue can be rubbery and stretch, and very susceptible to heat, possibly even melt on a hot day, it's best to use hot glue to hold a case together temporarily while a much stronger adhesive dries.