Kingdom Hearts II/Missions and Mini-Games

Mail Delivery
Jiminy's Requirement: "Complete in 14 seconds"

Very, very easy to complete in the time limit. Just make sure that you start to grind at the top of the ramp, to allow of enough buildup to reach the second bird. Don't manually jump or anything, otherwise, you might overshoot. After delivering, do a sharp right to reach the last person.

Carco Climb
Jiminy's Requirement = "Complete within 15 seconds"

For an easier time, equip Fenrir for Negative Combo, as well as the ability that Sora learns at a certain level, depending at what weapon you picked at the beginning of the game. Also dequip other abilities that'll interfier, such as combo extenders.

Once it starts, lock onto it, and perform a triple combo. This should cause the cart to be thrown into the air. Quickly hit it whilst in the air to push it a great distance. Immediately perform another triple combo once it lands again.