We're getting there, but a few changes are crucial here. Your movesets alone aren't bad, but there's a few necessary changes:
- Crobat can make some use of Fly and Toxic potentially, but this is a role best left to something with more bulk like Skarmory since it doesn't really make the most of Crobat's biggest strength: Speed. Instead, Crobat will be looking at moves such as Taunt, Hypnosis and to a lesser extent Confuse Ray to torment targets before they have a chance to strike back. Air Slash works nicely with Crobat's Speed and aids disruption, so I'd keep that - other handy moves include U-Turn and Heat Wave, the former to allow Crobat a quick getaway while inflicting more damage, and the latter to strike foes resistant to Air Slash. I'd consider leading with Crobat actually, using Air Slash, Hypnosis, Taunt and something else filler, while having something like Lum Berry, Black Sludge or Focus Sash as the hold item.
- Forretress would probably be better with Stealth Rock than Kabutops would since Kabs is better at attacking, whereas Forretress is perfect for setting up Stealth Rock. Rapid Spin is definitely usable on Forry as well, but I've found in the past that having both Rocks and Rapid Spin on Forretress really disarms his ability to do damage outside of Explosion, making him dead weight very quickly. Earthquake works better than Bug Bite here due to it being more damaging and also providing better coverage - I'd drop Protect for Stealth Rock and give Kabs something else instead, more on Kabs when I get to him. He can keep the Leftovers.
- Gallade could do with something a bit better than Quickpowder really since it tends to be an unreliable measure at best and can be a downright useless one at worst if you're especially unlucky. Also to note here is that Gallade's Speed stat is a bit of a let-down when it comes to using Swords Dance, and he is very prone to having someone faster come in and revenge-kill him mid-sweep to end his fun rather abruptly. I'd personally give Gallade Choice Band here and drop Swords Dance for Trick. With this, Gallade will be able to inflict HUGE damage with attacks right away, while also having a way to "unlock" his moveset if necessary by giving his Choice item to an opponent - you'll want to Trick the Band onto a more defensive Pokemon really, that way you cripple them for the entire match and you've one less adversary to worry about in the long run.
- Lapras actually works OK here due to Kabs having Swift Swim - I'd go for Damp Rock as his hold item here though, since that way you get 8 turns to play in the rain instead of just 5. I would be careful about having this rain turned against you however, since Typhlosion is weakened considerably by its effects and if both Lapras and Kabutops are down but the rain is still pouring down, your opponent could very easily use it against you - make sure you know when (and when not to) use Rain Dance here. Otherwise, the moves work OK for Lapras and it's certainly an interesting set.
- Typhlosion luckily won't have to worry about "avoiders" since Evasion Clause bans the use of Double Team and Minimize for you, meaning Typhlosion won't need Swift. Sadly, Typhlosion really is strapped for move options beyond that however and is often forced to innovate in order to succeed, but Typhlosion can catch foes off-guard surprisingly effectively should they underestimate him (and most will do.) Substitute is a standard on Typhlosion since it gives him an effective way to activate Blaze that doesn't require the opponent beating his brains in. I actually prefer Lava Plume on Typhlosion for Fire STAB since a lot of people will oftentimes switch Fire-resistant foes in on him hastily, underestimating Typhlosion's real options and Lava Plume can punish them for that with its 30% burn chance. Hidden Power is a nice pick also if the type you get is a good one (Electric, Ice or Grass are the best picks here - don't bother with it if the type is none of those) and if all else fails, you can run Lava Plume and, say, Fire Blast on the same set, so you have one raw power STAB attack and one less powerful but more reliable STAB that can catch fire-resistant switch-ins out and burn them effectively. Salac Berry or Petaya Berry would be my pick for the item here actually due to how well they both work alongside Blaze and Substitute.
- We've already established that Kabs doesn't need Stealth Rock anymore and doesn't want Rock Climb either, so it's straight attacks for Kabs here. Superpower and Low Kick are very nice options to strike Steel-types with on top of your STAB moves and X-Scissor can fend off Grass-types attempting an easy kill. You could possibly attempt Swords Dance here, since Kabutops with both a Swords Dance boost and a Swift Swim boost is absolutely deadly, but it's a difficult setup to pull off and I wouldn't really recommend it unless you know of an effective way to get the setup down. Rain Dance itself is also a filler option for Kabs in case he gets caught out of the rain and needs to re-activate it, so there's quite a few options to consider here.
One issue you do currently have is that you have 3 Pokemon weak to Electric and no-one who resists it - same applies to Rock bar Gallade who resists it, but this especially is an issue with 3 Pokemon suffering a Stealth Rock weakness. I'd keep this in mind if nothing else.
