This is in terms of IQ rank, so a smart dinosaur is smart for a dino, but extremely low compared to a human still
Ranks
1.snake (high IQ, skilled assassin/secret agent/spy, kills all the terrorists in the world with his bare hands)
2.metaknight (Builds a freaking huge ship with everything you could imagine on it, by himself, and more than once)
3.samus (Bounty hunter, able to kill all lifeforms on every planet she lands on, outsmarts every space pirate including Ridley, most likely built her own suit and ship)
4.Olimar (astronaut who rebuilds his entire ship, knows all species of animals he sees very well, able to command an army of pikmin)
5. Mario/Doctor (Well trained in nearly every job known to man)
6. C. Falcon (bounty hunter, skilled pilot/racer)
7. Mewtwo (Psychic pokemon smarter than most humans)
8. Roy (General IQ, not as bad as the other F.E. characters)
7. Marth (General Shemale)
8. Ike (General who fights for his friends)
9. fox (fox that gained enough intellegence to pilot a space ship)
10. wolf (same)
11. falco (same, they just killed their human overlords, and stole their ships)
12. ness (Kid that can attack with mental capabilities, Jeff was the smart one though)
13. lucas (I'm pretty sure ness is more powerful psychic wise)
14. pokemon trainer (person) (he trains pokemon and knows how to use them, he pretty average)
15. wario (all of his abilities are sporadic like G&W, they were mostly cartoony, his plots always end up hurting himself and waluigi if he is there)
16. luigi (shadow of his brother, he didn't have nearly as many jobs as mario)
17. ganondorf (doesn't know he has a sword most of the time, he kidnaps zelda but always gets beat by link over and over again, not so bright)
18. link/young/toon (never talks, but somehow becomes the hero of everything, most of the time not knowing what he's doing)
19. zelda/sheik (magic and a triangle doesn't make you smart, she let her kingdom get taken many times, refusing to actually use the Hyrule army correctly, her palace is only accessible with the use of double hookshots, that's dumb)
20. kirby (Most of the time does not know what he's doing)
21. bowser (turtle that captures peach and always gets beat by mario)
22. peach (Kidnapped by a turtle, despite having a much better army)
23. De De De (lumbering idiot who gets beat by kirby after his Ingenious plans fail)
24. Pit (gets sent out of heaven cause he was an annoying idiot, and somehow is able to easily die while in the underworld, tell me who dies after all ready dieing)
25. I.C. (they know how to survive and climb mountains)
26. R.O.B. (Super computer, but as everyone knows, the human brain is thousands of times smarter than a robot's)
27. Lucario (very smart pokemon, can almost talk correctly)
28. DK (he is somewhat civilized... as Tarzan is)
29. diddy (same)
30. Yoshi (dinosaur with motherlike instincts)
31. Pikachu (pokemon who can escape a pokeball)
32. Jigglypuff (pokemon who can sing and plays with sharpie for fun)
33. Charzard ( follows order, he seems maybe smarter than other pokemon)
34. Ivy (plantimal, average pokemon)
35. Squirtle (turtle, average pokemon)
36. Pichu (manages to hurt itself with every step it makes)
37. Mr. G & W (single sprite programmed for 1 or 2 actions at a time, dumber than any animal, or even a plant)