raise its happyness to max
Snorlax does not evolve. However, he does evolve from Munchlax. There is no specific level that Munchlax evolves. If he levels up with a high happiness rating, he will evolve into Snorlax.
At level 100
To evolve the Munchlax you just have to level it up when its holding the leftovers.
It evovles with max happiness
by leveling up to level 78
You can only level it up by, high friendship
Rephrase your question = What level does snorlax evolve on Pokemon diamond? =
level up with base happiness at 220
you have to level up at a high friendship level.
Please clarify your question. What level does evolve in diamond? What Pokemon are you talking about?
Munchlax evolves into Snorlax by max happiness.
Ponyta evolves at Level 40 in Pokemon diamond.