Cosmic Wars

At the game mode screen, highlight "All Right?", hold Select, Start & Down and press B. Now, when you buy units, they will be worth 20 instead of 1.

After using a warp, instead of choosing "next", choose "End" and when the "Side Change" message comes up, press B to say no. Now you'll be able to use the warp again.

When you recruit a commander, you get the chance to change his name. Press Down or Up the following number of times to change it to a specific Japanese name. After doing so, create your first fleet and you'll have $99,999. You can only enter 1 name per commander, so enter all 3 names to have 3 commanders with $99,999.

During the intro, hold A + B + Select + Top-Right and press Start to watch the Alliance ending. However, also during the intro, if you wait for the huge red ship to appear and do the same code, you'll see the Bacterion ending instead.

Normally, you will see an animation as you end your turn and swap to the next player. If, during said sequence, you hold Up, Right, A, and B simultaneously, you'll end up skipping that sequence from there on out.