Vanillish: Clearly an ice cream cone.
Tropius: It's practically canon that the fruit growing from their necks is extremely sweet and juicy.
Octillery: Mmm, calamari.
Farfetch'd: Also somewhat canon. Even comes with its own garnish.
Exeggutor: Coconuts, duh.
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Okay, time to start the preparations for the next contest. Gotta be almost time for VGMC6, right? http://www.youtube.com/watch?v=KloeGqCPszo