Moving Out 2

There are three types of collectibles in this game: Style Crates (wooden crates with a hanger on them), Character Crates (wooden crates with an eyeball on them), and Arcade Carts (N64 cartridges). You need to collect all of them for achievements. Each area's portal shows tracking of how many collectibles you've found in that area, and it doesn't distinguish between the type. Within each area, collectibles can be found both in the overworld and within levels. The ones within levels are tracked on the level select screens; some levels have one collectible, but many have none.

For a text guide of all collectible locations, use THIS GUIDE. Most collectibles you'll be able to find yourself, but I consulted this guide for ones in levels that were very deviously hidden.