Reducing Monster Size

[Amakule]

I know the stat changes to increase a monster's size, found on page 291 of the Monster Manual, but I haven't been able to find anything about the stat changes from reducing a monster's size. I'm looking because I'd like to make more anthropomorphic animals, and it's general knowledge that I'm sure will come in handy.

[Pilo]

You may try to invert the table by yourself.

Exemple:
Diminutive Tiny +2 -2 Same Same -2
Becomes
Tiny Diminutive -2 +2 Same Same +2

You have to multiply score adjustments by -1.

[Kuulvheysoon]

Have you tried the Dungeonbred template, found in Dungeonscape?

[Amakule]

Have you tried the Dungeonbred template, found in Dungeonscape?
For a player to apply that to an animal and then anthropomorphize it would be quite cheesy. Str & Con should be lower when the monster gets smaller.

You may try to invert the table by yourself.

Exemple:
Diminutive Tiny +2 -2 Same Same -2
Becomes
Tiny Diminutive -2 +2 Same Same +2

You have to multiply score adjustments by -1.

It's definitely not what they did for the anthropomorphic animals that reduce in size. Besides, I'm hoping for an official source so I don't have to concern my DM with homebrew.

[Kuulvheysoon]

For a player to apply that to an animal and then anthropomorphize it would be quite cheesy. Str & Con should be lower when the monster gets smaller.

The Dungeonbred template doesn't take into account size modifiers to ability scores.

For example, if applied to a Huge creature, the template's bonuses are added after the size modifiers.