[quote name='io']Supposedly it makes him stronger for when you call him to "fight" for you. However, I've called him twice: once he did nothing, and the other time he hit the 8 guys surrounding me for a whopping 1 point damage each. So I'm not sure how the hell I'm supposed to play with him - I click on all his spots (food, computer, scratching board, bed) and get lots of happy faces, but it doesn't seem to matter. It is possible that both of those times I skipped playing with him (and hit the alarm clock instead just to cut it short). Maybe you need to play with him the right way for that exact time you are out and call him? I had thought it was a cumulative thing and was surprised he did nothing.
[/QUOTE]
Mochi is a powerhouse. You just have to know how to level him up, and it IS cummulative. I can't hold it in any longer, here's what you do:
When you get to play with Mochi, tap a part of the screen below where he is sitting. Then, gently drag the stylus across Mochi. This should make him roll onto his back (if it doesn't work from the bottom, try from the left or the right. IT IS VITAL THAT YOU DO NOT TAP MOCHI FIRST, tap a spot AWAY from him and drag the stylus towards him). At anyrate, once Mochi is on his back, rapidly tap his body(this can be hard as mochi fidgets around, so if he stops responding to your taps, try tapping a slightly different spot on his body). You should be able to get 30-40 smiley faces before he gets back on his feet. You should be able to repeat this 3 or 4 times before the alarm goes off. If you see a Big smiley face, that means Mochi has gone up a level. After about 4 "nights", I had Mochi dealing about 800 HP of damage per enemy.
Enjoy.