I know several others are on board with this idea, but to make it formal (and to bring some activity here), here it is...As the name describes the goal is to complete all levels without making use of any warps, glitches or major shortcuts commonly seen in the other categories.

Obviously the exact rules will need to be determined and finalized by the moderators, but to get some discussion started I'm going to mainly leverage the rules CurtsNewBrand came up with (with some additions) as I feel it's a good starting point for what would be allowed/banned.

Banned Glitches:

-Double jumps (can go back if you perform one by accident)
-Glitched grabs (veggie glitch, pow glitch, etc.)
-Floor clips (1-1, 1-3, etc.)
-Walking on the ceiling (3-2, 7-2, etc.)
-Zombie rocket
-Wrong warps (3-3 star kill, 2-3 door glitch, etc.)
-Elevator glitch
-Fast carpet
-Wart 7th hit glitch

Allowed 'Glitches':

-Vine/chain/ladder jumping
-Abusing bounce mechanic of blocks/keys
-Skipping digs by walking on an enemy
-Kill code when not in a rocket
-Abusing pick up animation invincibility frames
-Clipping into ledges
-Picking up enemies/objects from below or the side

Banned Shortcuts (not covered implicitly by the banned glitches above):

-1-1 shortcut door behind the bombable wall
-1-2 using the carpet/Ninji to bypass key/underground area
-3-2 skipping sections with Princess/Luigi
-3-3 skipping the intended route with a Ninji (must go through locked door)
-4-3 jumping the large gap with Princess/Luigi/Mario
-5-3 ducking past the small jars in the tree section
-6-3 shortcut door to the left of the first ladder (must go right)
-7-1 jumping over the tall pillar in the second area with Luigi/Princess

Allowed Shortcuts:

-6-2 jumping across the Albatosses/Beezos
-7-1 jumping to the left toward the rocket right away

I think this is worthy of being a category here. Couple other techniques would need to be discussed in my opinion:

• Clawgrip Quick Kill
• Double bounce hits with enemies on birdo (5-3)
• 1-1 jumping up to high hill using a charge jump from tweeter and/or jumping up with Luigi
• 3-1 left of vine shortcut door (which forces you to go on ceiling to get to birdo)
• Star Kill birdo (1-2, 2-1, 4-2)

All good suggestions. Thanks Rohbert!

• Clawgrip Quick Kill
-Yep definitely a glitch I would ban

• Double bounce hits with enemies on birdo (5-3)
-I feel this is fine as an allowed 'glitch'

• 1-1 jumping up to high hill using a charge jump from tweeter and/or jumping up with Luigi
-I would consider it a minor shortcut that would be allowed for this. Sure you skip one room, but it's easy enough to jump up with any character

• 3-1 left of vine shortcut door (which forces you to go on ceiling to get to birdo)
-Forgot about this shortcut tbh. I wouldn't allow it

• Star Kill birdo (1-2, 2-1, 4-2)
-This is fine imo