On the topic of Taunt, I actually feel it should be allowed, as it adds to Krillowatt's customisability.
Taunt is for more than breaking walls, and, Taunt alone is not going to deal with Snorlax, who'll just KO you, or Blissey, you'll Sismic Toss you to death unless Krillowatt's carrying a Fighting-type move. That's 2 moves to counter 1 pokemon.
Taunt can be used to counter things that are not offensive, such as Baton Passers, stat-uppers which may be able to take a hit, such as Agligross or DDTar. However, it would't just be a case of 'Slap Taunt on the movesets'.
Basically, Killowatt's not going to be taking down Blissey unless it has a Fighting-type attack as well [2 move for 1 pokemon = Heavy Customisation], nor Snorlax at all, and Taunt is not going to stop anything countering Krillowatt. It won't even be a good wallbreaker with it's offensive stats.
However, all stat-boosting and recovery [Bar Rest] should be disallowed.
Will-O-Wisp should be disallowed. It cripples Swampert and Tyranitar, two checks, and would soft-counter more than half of the physically based OU.
Destiny Bond on a pokemon with a Base Speed as high as KrilloWatt's, would be broken. Sure, Froslass is faster, but Froslass isn't bulky, and built to counter a specific threat. Killowatt with Destiny Bond would counter threat #1, then take down whatever revenges it, unless it's faster or Scarfed.
Whirlwind and Roar for disallowed. With Killowatt forcing switches anyway [Because who's going to keep in whatever Krillo Switches into, because it screams 'I counter You!'], Phazing moves will add to hazrd abuse, and possibly drag back in the 'victim', allowing for more cycles. It could be easily abuseable.
Taunt is for more than breaking walls, and, Taunt alone is not going to deal with Snorlax, who'll just KO you, or Blissey, you'll Sismic Toss you to death unless Krillowatt's carrying a Fighting-type move. That's 2 moves to counter 1 pokemon.
Taunt can be used to counter things that are not offensive, such as Baton Passers, stat-uppers which may be able to take a hit, such as Agligross or DDTar. However, it would't just be a case of 'Slap Taunt on the movesets'.
Basically, Killowatt's not going to be taking down Blissey unless it has a Fighting-type attack as well [2 move for 1 pokemon = Heavy Customisation], nor Snorlax at all, and Taunt is not going to stop anything countering Krillowatt. It won't even be a good wallbreaker with it's offensive stats.
However, all stat-boosting and recovery [Bar Rest] should be disallowed.
Will-O-Wisp should be disallowed. It cripples Swampert and Tyranitar, two checks, and would soft-counter more than half of the physically based OU.
Destiny Bond on a pokemon with a Base Speed as high as KrilloWatt's, would be broken. Sure, Froslass is faster, but Froslass isn't bulky, and built to counter a specific threat. Killowatt with Destiny Bond would counter threat #1, then take down whatever revenges it, unless it's faster or Scarfed.
Whirlwind and Roar for disallowed. With Killowatt forcing switches anyway [Because who's going to keep in whatever Krillo Switches into, because it screams 'I counter You!'], Phazing moves will add to hazrd abuse, and possibly drag back in the 'victim', allowing for more cycles. It could be easily abuseable.