Learn whirlwind and blow the pikachu out of the Pokemon center.
1: You try to learn whirlwind, but you are only a level 6. You got a long way till you learn whirlwind. The Pikachu uses your focused distraction as a chance to attack, zapping you with thunderbolt. It's super effective. Your mind is fried, and your muscles spasm uncontrollably.
Absorb the Pikachu attacks to obtain a thunder armor
6: Something inside you changes as electricity arcs through your body. First, the pain disappears, then, you notice a yellow barrier completely surrounding your body. You had heard the legends, when an indomitable enough bird was struck with thunderbolt, legends say they take on the electricity as an armor, protecting them from physical attacks, and damaging those that get to close. Unfortunately, you now can't touch anything without destroying it. Eating would be a challenge.
Squawk squawk slave squawk I am superior squawk
Murder pikachu on purpose this time
2: Everybody in the room was staring in awe at you, you take your newfound powers and strike back at pikachu with you electricity powers. However, Pikachu was an electric type, so the attack had no affect on him. Pikachu still looked furious, but was hesitant to attack you again.
Threaten to murder the pikachu's trainer's family if it doesn't back off.
3: You decide to take a different approach, threatening to kill his trainer and his family if Pikachu didn't back off. Pikachu did not seem impressed by your threats, and continued to watch you for signs of attack.
Since gods can apparently be invoked by us, why not get one to brainwash it and its trainer to serve our will?
2: You pray to the Pokemon Gods again to brainwash the human's mind, but it turns out that the god's don't actually care about you. Apparently, they would have saved Pikachu whether you prayed or not. Slightly embaresed, you decide to flee instead of continue the fight.
Spontaneously evolve better wings.
4: You flap your wings, and find that the Thunder Armor gives the air lots of convection, which makes it much easier to fly. You leap off of the ground, and exit through a window, out of the poke-center. Only now that your adrenaline was gone, did you realize how tired, injured, and hungry you were. You try to fly into a tree, but your electricity sets the tree on fire, so you land on the ground.
Become part ground type.
6: Immediately, the ground conducts the entire charge, creating a sizable crater, and destroying your barrier. The crater fills in with you still in it. When everything settles, you are stuck neck-deep in the ground, unable to move. You have to find a way out before other pokemon make you lunch, but you were also thinking about a poster you saw in the Poke-center. It was for the Indigo League. If you were going to make a name for yourself and all pokemon, that would be a great place to start. But first, you needed to get out of your hole, and also get 8 gym badges. But Food for thought...