Below are the opinions of several WikiUsers:
Banana, obviously...
It's a close count, but it is Frijj, followed by Yazoo. LB.
Bacon.
I am 90% sure it is a strawberry milkshake.
Vanilla is his favorite.
Yes! with any flavor you want!
Strawberry
I'd say chocolate (only because i like it though)
strawberry
He is vanilla milkshake poptart. I went on poptarts.com & "hunted" him. You watched some weird video & then you ended up in his apartment & caught him coming out of the shower without a ninja costume. Then in big letters across the screen it said,"The New Flavor Is Vanilla Milkshake!" so yeah.
" Unless you dislike that flavor, I could get you a strawberry milkshake. "
Oreo chocolate