What are the specific rules surrounding creatures that are size Tiny or smaller and could I get a link to them please?
The PRD is incredibly unintuitive and I can't find them anywhere, save for the generic "size bonuses" table, which doesn't cover everything.
Such as being allowed to choose between Dex or Str for attacks, CMB/D, etc.
I've read it somewhere and now I can't find it. :(
Ty for CMB/D reference. :)
If you look at a typical tiny monster you'll notice (a) it has a good attack bonus, derived from its dexterity, and (b) it has the Weapon Finesse feat, which is the actual reason it gets to use dexterity that way.
It may not apply to Tiny, but be for Diminutive and Fine, but I know it wasn't the errata for Climb/Swim, and that it was specifically talking about getting to choose for Attack rolls.
Ugh, wish I could find it. :/
Familiars say if they are small enough they can choose which stat to use.
Default tiny and smaller creatures do not get to choose to use dexterity instead of strength to attack with. Familiars seem to be the exception (and it's not limited by size).
Attacks: Use the master's base attack bonus, as calculated from all his classes. Use the familiar's Dexterity or Strength modifier, whichever is greater, to calculate the familiar's melee attack bonus with natural weapons.
Looks to me like they usually rely on the size modifier for really small stuff to gain a good to hit. None of the tiny- critters I looked at without weapon finesse got to use dex instead of strength to hit. A lot of tiny critters select weapon finesses as their first feat. Note also that some tiny- creatures such as the Inevitable (arbiter) and gremlin(grimple) gain finesse as a bonus feat.