Ok I am a man of logic and reason and all that but..... HOW!!!!

Am not joking with the movie with the potion there still logic to it and everything!

for one how in the earth that made the inside look like a phone that you can eat??? like, do that have GMO magic for food to make them work the way they want? Or is it that they use plants to make stuff like "Hey i want pens but i don't feel like making them so I will make a way to grow them and harvest them!"

ok if it was just discord i would let it past but then we see taxie just pull a banana phone out of her hat like its nothing meaning she done it before!?

My suggestion would be that that banana is nothing but a convenient focal point - something vaguely telephone-shaped for user to latch the spell on. She could've used a shoe the same way - if they had human shoes.

Or it could just be a gag from animators.

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It was Discord if I remember correctly. That was the episode where he did become a professor.