AdventrPika is exactly like AdventrSnivy but asks for a Pikachu instead of a Snivy but if you don't know who and/or what AdventrPika and AdventrSnivy are they are a glitch in the gen 7 (not including the let's go games) GTS system that offers level 100 shiny pokemon for either a Snivy or a Pikachu and soft bans you from the GTS and for a strange reason they have multiple pokemon deposited in the GTS
a guy on GameFAQs: There’s also a guy named AdventrPika who does the same as AdventrSnivy, but asks for Pikachu