DK is the sixth battler on the way to Master Hand. He can collect much damage, so use drill kicks and the like to build up damage. If you're using Yoshi, stand near the edge and eat DK. This'll be an easy KO! Another way is to throw DK when he has around 200% damage and keep hitting him with a smash hit every time he Spin Kongs back.

DK's jungle is a little stage, perfect for DK himself. Lightweights will easily fall to powerhouses on this stage. Also, one can jump up through the floor to attack someone!

DK
A+Up(Smash): Hand Clap
Because DK is so tall, the opponent needs to be mid-air above him to be hit. It's worth it, though, as this is a most powerful attack!
Anti: Be sure never to attack DK from above unless he's busy with someone else.

A+Up(Normal): Wave
DK's hand spans a long way around as he throws it around himself. This is a great way to clear out a crowd.
Anti: When you see DK start up this attack, roll out o' the way. Wave is slow.

A+Side(Smash): Slap
DK lunges his palm at whoever he's facing. This has bad precoil.
Anti: Get far away from or up close to DK. Because he's so big, his Slap will miss if you're close enough.

A+Side(Normal): Big Punch
Use this as a Slap without precoil.
Anti: Use your triple jump right below Fox to get on the platform.

A+Down(Smash): Spinning Split
Time this right to hit opponents on all sides. A simoultaneous, multiple Trip.
Anti: Jump up.

A+Down(Normal): Swift Slap
Trip up your opponents
Anti: Jump up again.

A: Punch
A Twice: 2 Punch
A Multiple: Upercut Punch
A+Dash: Dash Kick
Use this like a moving Back Kick.
Anti: Jump up here, also.

Mid-air: A: Spiral Kong
DK uses an attack similar to Spinning Kong, and this is about as useless.
Anti: See Spinning Kong.

Mid-air: A+Back: Back Kick
This is good for deflecting other arial attacks.
Anti: Use an attack from the side DK isn't attacking from.

Mid-air: A+Down: Feet Thrust

Use this on an opponent on the ground, then use the Clap.
Anti: Roll out o' the way before DK comes down.

B: Giant Punch
Wind up, and let 'er rip! This is even better than the Slap.
Anti: Same as Slap.

B+Up: Spinning Kong
Use this only as a triple jump. Be careful to stay in one place after you get back over, but not on, land.
Anti: Use a smash attack.

B+Down: Hand Slap
Use this where a big crowd is to give tons o' damage over an' over.
Anti: Double jump when in mid-air to escape it.

R: Throw
Press R a second time after grabbing to get a hold and keep it. Move to where you want to throw quick 'cuz the foe can escape.
Anti: Press every button as fast as possible to escape his grip.