Use the ball & chain to destroy the lookout tower next to the fence; twirling the ball & chain consistently breaks the tower, while throwing it will often make it bounce off the tower. Go through the gap, then wedge Link through the right (GCN) side of the fence. This clip can be done as wolf (dashing continuously) or as human (rolling repeatedly).
Charging a B attack in the position shown roughly standardizes the camera angle. From there, direct the control stick towards the spot where Link can clip and dash. The required dash timing is somewhat precise and not well understood. While this method is faster than the ball & chain method in theory, it is difficult to save time with it, so the ball & chain method above is recommended when the ball & chain is available.
After triggering the bulblin archer cutscene, run over to the left (GCN) side of the barricade and wait for a little while until one of the boars runs into the wall, launching the bulblin riders onto the wall. As wolf, get close to the wall and use a Midna charge to target the riders. Walk back a bit from the wall and release the attack to superjump onto the wall.
Perform Map glitch, dash or roll up to the broken wall before the main part of the camp, and LJA from the corner of this wall to the hill OoB. From there, it is possible to jump attack diagonally to the King Bulblin trigger. The bulblin archer will shoot fire arrows at Link during the daytime but not at night; see setup for how to handle this. It is also possible to shoot a bomb arrow at the rotisserie boar through the wall to release the HP for later. This method is 3.5s faster than the other Map Glitch method described below.
Perform Map Glitch (this can be done just before climbing the wall while transforming to human, but doing it immediately after the load zone or archer cutscene allows for unplugging the controller)
Roll to the broken wall and climb up the left edge
Walk forward or charge a spin attack to reach the front edge of the wall
Sidehop right 3 times, making sure the bulblin archer shoots and misses during the sidehops
Aim at the corner of the hill and LJA over
Roll forward, line up (can use minimap), and jump attack towards the King Bulblin trigger, making sure to cross ground level out of bounds
After entering the Bulblin Camp, immediately perform Map Glitch and backwalk off the solid ground. Do a jump attack while falling to give Link forward momentum. If done right, Link will eventually hit the cutscene trigger, which will reposition him above ground.
This strategy saves about 3 seconds over completing the fight without a bomb, assuming bombs are already equipped.
If you shoot a bomb arrow at the boar and throw boomerang afterwards, you can being rolling towards the poe rather than rolling to the boar and using Mortal Draw. This has been roughly timed to save 38 frames, however may include an additional equip in the 100% route.
See messenger fights tutorial video.
Jump from a tent to a wall, LJA to another wall, and jump to the tent to trigger the King Bulblin cutscene, saving ~8 seconds over getting the key. The timing for the LJA is tight. This is the fastest way to enter the KB3 fight without Map Glitch.
It's possible to get on top of King Bulblin's tent with bomb boosts. This is slower than the LJA methods above.
Strats for Cave of Ordeals are now located here.