Scratch

Well, a couple of the players have their Point In Directions reversed...they are pointing in direction 0 when they should be pointing in 180.  Take a closer look at that.  As for making it so that the red guy changes costume when he touches any blue player, you should probably use the color sensing block:

[blocks]
<when green flag clicked>
<forever if><touching color[ Blue
<switch to costume[ Tackled
<wait( 2 )secsc>
<switch to costume[ Running
<end>

[/blocks]

... or whatever you want it to do

Pacatafox wrote:

All the scripts for the blues are the exact same, but 2 of them get stuck in the wall.

When I looked at it, the two getting stuck in the wall had different scripts.  Try deleting their scripts and copying them from a blue one that works.