The Energon Pub

There's a couple of things I want to ask about the PS2 version of Transformers The Movie: The Game.
First one is, when playing as Barricade during the fight against Bumblebee on the second level, each time he reaches a location and starts powering up his blast thing, a small blue dot races off along the roads on the minimap. I caught up to it, but there was nothing there. What is the blue dot supposed to be?

And also, who are the playable characters? I have only played as (for the Autobots) Bumblebee, Jazz, Ironhide and Optimus Prime, and for the Decepticons, Blackout, Barricade, Starscream and Megatron. Are there any others? Like, can you play as Ratchet, Brawl and Bonecrusher?

Scorponok is really the only other playable character.

Oh yeah, Scorponok. Forgot to mention him.
That game would have been so much better had they introduced all of the cast from the movie and had a two-player mode and a character select for completed levels.

trade this game in..... i got to the end...... i got call of duty 4 instead