LVLINGForum-Index → Help → LVLING
Having a premium account provides an ehp/exp boost to your pokemon. You can also buy red/yellow/blue flutes from the Item Shop that increase the ehp/exp your pokemon get as well. Though you need nuggets to buy these perks.
Additionally, interacting with the pokemon on the index page has a good chance of providing your pokemon a boost. The eggs/pokemon on your party have a chance of appearing there next after you interact with the current ones.