I would say both freezer and tnt find little use for me. In MP, freezers do not seem to have any effect (Hammer the spacebar a few times and you break free) and in SP, you have to buttstomp or shoot the enimie before it's gone for good. I notice you can shatter frozen stuff by running into them, but if it's a baddie, you will get hurt.

TNT is useless in MP because it simply does not do any damage. it's use in SP is limited to blowing blocks, and thanks to it's spontainious "Blowing", does not make an effective combat weapon.

One weapon that I also dislike (but use it anyway) is the RF missile. It does not use rapid fire, which is annoying, but the blast throwback is downright frustrating. This is the weapon I raced around with in JJ1 mindlessly fireing away in close corridors? Hmmmmm....

On the good side, The powered up RF's actually helps in SP for taking care of Tuf Turtles.

The eletroblaster had the potential to be an interesting weapon, but it lacks range and power.