Why isn't yoshi allowed in the castle?

[The name master]

I just thought. Why does Mario never take yoshi into castles (particularly in super Mario world) or ghost houses?

[That Girl in the 'Roo Suit]

Because you wouldn't enter a house on a horse

[The Hooded Trainer]

Because the devs didn't want to design every level around yoshi. Also, because a dinosaur would probably mess up the carpets and furniture.

[The name master]

I did a Google search "why isn't yoshi allowed in the castle" but it didn't have anything. There was a video, but that doesn't explain anything.

[Petzbreeder]

My brother always told me that Yoshi is too afraid to enter castles and ghost houses.

[The name master]

The fact that yoshi can't go in castles leaves some questions unanswered. One of them is can yoshi eat Mechakoopas?

[Lord Raven]

Because you wouldn't enter a house on a horse

hilariously berwick saga (think fire emblem but weirder and for the PS2) doesnt allow you to visit houses unless you dismount

also FE3/5/berwick/tear ring saga require you to dismount indoors

[SirBlaziken]

Yoshi, though he can play baseball and compete in olympic sports, apparently isn't housebroken.

[Captain Jigglypuff]

Dorkly's has a video on YouTube that answers this question!

[SirBlaziken]

^Really? Because I feel like I explained it quite nicely.

[The name master]

I played super Mario advance 2 (a remake of super Mario world for the GBA) and I put codes in to make yoshi appear in the item reserve box. So by pressing select, a yoshi appears. I don't know weither it was the codes that weren't perfect, or weither this actually what happens, but yoshi's tongue appears glitched. It appears as a solid red block. Maybe because either:

1) the developers were to lazy to fix this

OR:

2) the developers couldn't work out how to fix this

They decided to leave yoshi out of Castle levels.

EDIT: Yoshi cannot eat Mechakoopas!