Jolteon and Marowak look like a good combination.
Primeape neeeds a bit of work in my opinion. Protect and leftovers seem like a waste to me, 16% HP is in most cases extremely minor, especially with Primeape's relatively low HP. Also, both attacking moves are inacurate, which could pose a significant problem attacking.
I prefer Endure/Reversal on Primape, but thats a matter of opinion. Most importantly, though, I'd replace Protect or Rockslide with a more reliable move.
Starmie should definetly have Recover over either one of its attacking moves. Granted, this makes Starmie a bit less flexible in terms of moves, but it's worth it.
Entei looks good, but keep in mind you're wasting his great attack.
Overall, a very good team with correctable and minor flaws. Just keep in mind that my suggestions may not be the best, I'm known unintentionally post completely incorrect stuff.
[ 09-30-2001: Message edited by: JolteonG3 ]