I has ideas. Not just for Ash's current team, either, but for some of his reserves!
Pikachu: It'd have to learn Grass Knot to do this, but it could do a little something called Electric Grass. It readies a Thunderbolt while using Grass Knot, and the grass electrocutes the enemy as well as tripping them.
Grotle: I call this one Energy Bomb. It shoots an Energy Ball at the opponent, then follows up with a smaller, faster one that catches up with the first and causes a tremendous explosion upon impact.
Monferno: Inferno Wheel, I call this one. Monferno shoots a Fire Spin straight up, and it comes back down and surrounds Monferno. Monferno then uses Flame Wheel, absorbing the Fire Spin into the attack, making it outrageously huge.
Buizel: This one's name is a work in progress: Glacier Crash. Buizel fires off a Water Pulse, then follows up with a Water Gun, which fills the Water Pulse with more water, engorging it. Then Buizel follows up with Ice Punch, freezing the huge Water Pulse solid. It then crashes down on the opponent, or Buizel could use SonicBoom to make it explode.
Gliscor: Giga Scissor. It starts up a Giga Impact, then executes an X-Scissor attack, which fires the Giga Impact out towards the opponent and away from Gliscor, leaving Gliscor time to recharge while the opponent tries to evade the attack. Using Sand-Attack beforehand can help to prevent the opponent figuring this out.
Sceptile: Poison Armor. This would require either Sceptile to learn Toxic, a double battle to feature Sceptile and Ash's Muk, or a Toxic, Smog, or Poison Gas attack to be fired at Sceptile. Sceptile uses Solarbeam to absorb the poison instead of sunlight, and becomes immune to poisoning and Poison moves. In addition, Sceptile's Leaf Blade and Bullet Seed attacks all contain poison. It can finish off by blasting the SolarBeam, which contains mostly poison.
Kingler: Bubble Bomb. Kingler uses Bubble and Hyper Beam simultaneously, resulting in bubbles containing explosive energy, all flying towards the opponent. Each bubble explodes violently upon contact.
Kingler: Crab Toss. An evasive technique, requiring Kingler using Crabhammer to swing its large claw. The force sends the claw flying, with Kingler going flying after it at a speed likely to be faster than Kingler could normally walk. Intended to allow Kingler to evade an oncoming attack.
EDIT: Sorry, Hilikus, I didn't see your post. I didn't base any of my stuff off of your stuff, just so you know.