use sunny day
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 have to run around with it lots. also battle with it. those two things make Pokemon happy.
Yes but it shouldn't make you happy.
Just use them alot in battle and give them good berries and that should make them happy
Buy him a pokemon game
The way I do it is by giving the Pokemon you want happy a sooth bell, this will make the Pokemon grow happy fast. Then every day give the Pokemon a message at Veliston (spelling?). Also make sure that it's the first Pokemon in your party and never put in the PC boxes.
yes
train the Pokemon's give it a puffin or a rear candyto make it envolve
mabye pokemon amie
the only way to level up you Pokemon on Pokemon battle revolution is to make a custom pass and then train you Pokemon on your ds game then go back to Pokemon battle revolution and copy 'em again...that's the only way I know
not hard