In the PMOD Darkness/Time/Sky, you can 'switch' your partner's moves. For example:
Say I have a Vulpix as my partner with the moves Imprison, Fire Blast, Extrasensory and Feint Attack. I go to my partner Vulpix's "Moves" summary. I want her to use only the move Extrasensory. I select her first move, Imprison. It will say 'Switch' as one of the options. I 'switch' the move, and Vulpix will no longer use Imprison until I 'switch' it back on. I repeat this for Fire Blast and Feint Attack, and now Vulpix will only use Extrasensory in combat.
Also, if you do not want your partner to use the normal attack, 'switch' the IQ Skill "Exclusive Move User" on. This means that your partner will only use battle moves and not the basic attack.
That is how it works in later PMD games; I'm not sure if that's the case for Red/Blue Rescue Team.