pokemon platinum daycare fast leveling - without doing anything

[Sandal]

how do you lvl your pokemon fast in day care center without doing anything?

[Zidarose]

For the Pokemon to gain exp in the Daycare, your character in game needs to move around. Each step is worth some small amount of Experience Points. Having story events to do helps or having a free hand and something else to do to keep you occupied while you run up and down along a given route.