The RGP can stand for both Racer Grand Prix and/or Ringmaster's Grand Plan.
Krom wears tags because he wanted to enlist in the military.
Vyxx is the tallest of the racers of the RGP, which makes sense since female hyenas usually being taller than males is also a case of Truth in Television.
Tag and Miles convincing Meika and Sonny to talk things out makes sense when you remember that they themselves were in a strained relationship for awhile up until episode 17.
