Jet Force Gemini: Canine Battle Tank and Beyond
... I'm confused. The way you describe the title screen makes it sound like you played as far as getting the upgrades for the characters. Did you start a new game?
It seems as if there were was still a saved game from years ago on the last slot. That explains the appearance of the title screen.
And I forgot to add in the comment above, yes, I did start a new game in one of the other slots.