One "category" I'd love to see someone try is playing the Japanese 1.0 version, which includes the stocked-meat glitch; but, playing with no major-skip glitches. You could have four monsters who can promote whenever you like, and importantly heal (even from the dead) and change form whenever you like in later worlds. I've tried running this "category" before and would love to see someone else give it a shot, even if it's not a recognized category :)

From a hard reset on a Gameboy Player on GCN, here's one take on what the stocked-meat glitch could look like on the way to Castle Sword from the start of a new game.

1. Starting state
Redbull (D, 0:0)

2. Recruits an Albatros (C, 0:0)
Redbull (D, 0:0), Albatros (C, 0:0)

3. Recruits a Clipper (J, 0:0)
Redbull (D, 0:0), Albatros (C, 0:0), Clipper (J, 0:0)

4. Recruits an Albatros (C, 0:0)
Redbull (D, 0:0), Albatros (C, 0:0), Clipper (J, 0:0), Albatros (C, 0:0)

5. Flees battle with a Goblin (A, 0:0) on the left
Redbull (D, 0:0), Albatros (C, 0:0), Clipper (J, 0:0), Albatros (C, 0:0)

6. Clipper (J, 0:0) eats stocked meat, becomes an O-Bake (L, 1:0)
Redbull (D, 0:0), Albatros (C, 0:0), O-Bake (L, 1:0), Albatros (C, 0:0)

7. Redbull (D, 0:0) eats stocked meat, becomes a Drgonfly (K, 2:1)
Drgonfly (K, 2:1), Albatros (C, 0:0), O-Bake (L, 1:0), Albatros (C, 0:0)

8. O-Bake (L, 1:0) eats stocked meat, becomes a Werewolf (H, 3:2)
Drgonfly (K, 2:1), Albatros (C, 0:0), Werewolf (H, 3:2), Albatros (C, 0:0)

9. Albatros (C, 0:0) eats stocked meat, becomes a Hornet (K, 4:3)
Drgonfly (K, 2:1), Albatros (C, 0:0), Werewolf (H, 3:2), Hornet (K, 4:3)

10. Albatros (C, 0:0) eats stocked meat, becomes an Eagle (C, 5:4)
Drgonfly (K, 2:1), Eagle (C, 5:4), Werewolf (H, 3:2), Hornet (K, 4:3)

11. Hornet (K, 4:3) eats stocked meat, becomes a Beetle (J, 6:5)
Drgonfly (K, 2:1), Eagle (C, 5:4), Werewolf (H, 3:2), Beetle (J, 6:5)

12. Flees battle with a Zombie (F, 0:0) on the left
Drgonfly (K, 2:1), Eagle (C, 5:4), Werewolf (H, 3:2), Beetle (J, 6:5)

13. Beetle (J, 6:5) eats stocked meat, becomes an Ogre (A, 7:6)
Drgonfly (K, 2:1), Eagle (C, 5:4), Werewolf (H, 3:2), Ogre (A, 7:6)

14. Drgonfly (K, 2:1) eats stocked meat, becomes a Buruburu (L, 8:7)
Buruburu (L, 8:7), Eagle (C, 5:4), Werewolf (H, 3:2), Ogre (A, 7:6)

15. Flees battle with a Lizard (G, 0:0) on the left
Buruburu (L, 8:7), Eagle (C, 5:4), Werewolf (H, 3:2), Ogre (A, 7:6)

16. Buruburu (L, 8:7) eats stocked meat, becomes a Thunder (C, 9:8)
Thunder (C, 9:8), Eagle (C, 5:4), Werewolf (H, 3:2), Ogre (A, 7:6)

17. Ogre (A, 7:6) eats stocked meat, becomes a Dinosaur (G, A:9)
Thunder (C, 9:8), Eagle (C, 5:4), Werewolf (H, 3:2), Dinosaur (G, A:9)

18. Werewolf (H, 3:2) eats stocked meat, becomes a Warrior (B, B:A)
Thunder (C, 9:8), Eagle (C, 5:4), Warrior (B, B:A), Dinosaur (G, A:9)

19. Eagle (C, 5:4) eats stocked meat, becomes a Salamand (G, C:B)
Thunder (C, 9:8), Salamand (G, C:B), Warrior (B, B:A), Dinosaur (G, A:9)

20. Thunder (C, 9:8) eats stocked meat, becomes a Titan (A, D:C)
Titan (A, D:C), Salamand (G, C:B), Warrior (B, B:A), Dinosaur (G, A:9)

21. Dinosaur (G, A:9) eats stocked meat, becomes a Rock (C, D:C)
Titan (A, D:C), Salamand (G, C:B), Warrior (B, B:A), Rock (C, D:C)

While the Warrior has obvious use later in the game, if it gets promoted it can never again become a Warrior. So, this last step very much is dependent on whether you want to keep the Warrior alive all game, or just promote it now.

22. Warrior (B, B:A) eats stocked meat, becomes a Titan (A, D:C)
Titan (A, D:C), Salamand (G, C:B), Titan (A, D:C), Rock (C, D:C)

Cheers!