Super Paper Mario Tips

Easy Coins Fast
1st, make sure you have at least 11 coins.
2nd, go to stage 1-2 (go to flipside tower, red door).
3rd, go to the store (in the town, after going through 2 doors).
4th, buy as many shroom shakes as you can, for 11 coins a piece!
5th, use return pipe to go back to Flipside tower.
6th, cook all the shroom shakes into fried shroom plates (on Flipside's 1st floor).
7th, sell all the shroom plates to Howzitt (on Flipside's 2nd floor) for 35 coins!

You gain 24 coins apiece! My brother and I maxed out our coins in under 1/2 an hour!!