Due to his mental shortcomings he takes a dip out of his Wisdom, and due to his goofiness he takes a dip out of his Dexterity, however due to his mental shortcomings he gains some Strength and due to his goofiness he gains some Charisma.

Goofy matures like a dog, except due to his Fey background he does not physically age past his maturity and can live as long as he can manage to stay alive.

In his early years it is believed that Goofy was just your average happy-go-lucky Chaotic-Good boy, but as the years went on and his life went livin', between the orders of The Mouse being shouted at him and the suggestions of the demons being whispered to him he delved to a less-reliable Chaotic-Neutral, and closer to Chaotic-Evil although he's not committing evil acts on purpose, and to him he is simply doing what he is told and he would most likely consider himself Lawful-Good if asked or scryed.

Goofy is extremely clumsy and this is some parts due to his lack of Wisdom but is also due to his awkward size. Standing at six-foot-seven and weighing in at 210 pounds, Goofy is tall and ready to fall!

While a dog would normally be able to run faster than the average speed, Goofy is something...more or less than a dog, and he runs on two legs which makes him just average; for running, he is NOT average...

Much of what Goofy is is a mystery, to literally everyone, but one thing that CAN be deduced is that he, much like the rest of the members of the D***** Kingdom, is of Fey origins, giving him the obligatory Resistance to being charmed and the immunity to magical sleep.

Due to his big ol' floppy...ears and his long, hard...snout, Goofy has Adv. on smell and sound based Wisdom (Perception) checks

Dogs are man's best friend. Well, Goofy is MOUSE'S best friend, then, I suppose, and Goofy is deathly loyal to those he views as his masters. Goofy has Advantage against being mentally controlled or manipulated by anyone other than those he considers to already be in control of him, and even if he IS successfully manipulated or mentally controlled, he still cannot be forced to perform a task or put an action in motion which he knows would go against the wishes of his masters.

Due to his stinky, stubborn dog brain, once Goofy reaches Level 13 he cannot become Proficient in anything else, nor can he learn new languages or have his loyalties changed.