I've seen a couple reviews or comments online saying that it's boring to wait for Poke-kun to make a new game, or that the inputs in his room don't do anything, but this isn't true. I haven't mapped out exactly when to use each input, but I've figured a few things out that will really speed up the process;

-When Poke-kun is really depressed, bring in a visitor or hold down, it usually makes him feel better.
-When Poke-kun is thinking or playing a video game, turn on the light, it makes him happy.
-If he starts doing crunches, leave him be; his mood is great and he'll go to work in a bit.
-Don't bother spinning the d-pad, it's amusing, but it only dampens his mood.

Remember, Poke-kun will only leave home to program a few times a day; you'll have to either set the internal clock forward or wait a day if you want to keep grinding more minigames out of him.

Anyway, super charming and fun minigame collection that pays homage to the various eras of gaming, check it out on NGPC Selection Vol. 2.