Its probably because pikachu is a more known and loved pokemon

"One shall stand, one shall fall."

no they wouldn't because the Sonselasuchus cedrus would more or so be scared of us given its the size of a poodle, now I'm not saying they couldn't kill people because they could but most creatures wouldn't view you a s prey because animals usually hunt based off of size, that would be like a fly trying to take down a rat.