One of the Pokeetches might tell you.
i dont know i was hopping one of u knew
It has to be happy to evolve. I don't know how to get it happy. Sorry
In certain Pokemon games a person will tell you your Pokemon's happines. Others you have to use an item on it and find out yourself.
Look at your pikachu,face it, and press A
You can check a Pokemon's happiness at a game's happiness checker. Where the person is located depends on the game you are playing.
you talk to your Pokemon if they are first in your party and you can see by their expression weather they are happy with you or not. hope this helped :)
there is an app on the poketch that when you touch the Pokemon hearts appear above it, if the hearts are small then go big and then bigger it loves you fully
You can make it happy by treating it to spa.
You can make it happy by training it a whole lot. usually it takes a Pokemon 20-30 LVs to be fully happy.
You make your Pokemon happy by... 1. Giving lots of calcium, proteins, irons and carbos 2. Needs to know an HM 3. Level the pkmn 9 levels
In Pokemon heart gold you can get groudon later in the game but apart from that i really don't know. (sorry) PS happy hunting