When they first opened in Cerritos, they served the large shaved ice like this:
I believe they changed it to be a massive shell and not piled as high now but still ginormous nonetheless.
Their thick toast that come in chocolate, peanut butter and coconut. This thing was amazing especially when eaten fresh.
Of course, their boba milk tea is pretty good too. Other savory favorites I would recommend would be the popcorn chicken, pineapple fried rice (HUGE) and their minced pork stirred noodle. Man I'm drooling as I'm typing this. Yelp doesn't give it rave reviews but I definitely think it's worth visiting. They also open late but beware of the bopper crowd :)
Guppy House Hacienda Heights
Guppy House Anaheim Hills
Guppy House Irvine
images from Yelp