The Donkey Kong Country: Tropical Freeze Walkthrough reveals the location of every KONG Letter and Puzzle Piece in the game.  Can't find one? 
Donkey Kong Country: Topical Freeze Guide - Collectibles: Stage 5-6, Frosty Fruits
Crumble Cavern, Donkey Kong Country: Tropical Freeze, Nintendo Switch
3-6 Cannon Canyon - Donkey Kong Country Tropical Freeze Guide - IGN
Made a text and image based secret exit guide for Tropical Freeze : r/NintendoSwitch
Donkey Kong Country: Tropical Freeze: Prima Official Game Guide: von Esmarch, Nick, Van Grier, Cory: 8601410565862: : Books
Donkey Kong Country: Topical Freeze Guide - Collectibles: Stage 4-B, Shoal Atoll
4-5 Sea Stack Attack - Donkey Kong Country: Tropical Freeze Walkthrough - Neoseeker
Donkey Kong Country Tropical Freeze, Switch, Wii U, Gameplay, Multiplayer, Secrets, Wiki, Puzzle Pieces, Bosses, Amiibo, Game Guide Unofficial eBook by Hiddenstuff Guides - EPUB Book
1-2 Shipwreck Shore - Donkey Kong Country Tropical Freeze Guide - IGN
4-5 Sea Stack Attack - Donkey Kong Country Tropical Freeze Guide - IGN
Donkey Kong Country: Tropical Freeze Review (Wii U)
5-B Jammin' Jams - Donkey Kong Country Tropical Freeze Guide - IGN
Donkey Kong Country: Tropical Freeze Guide - Collectibles: Level 03-4, Scorch 'N' Torch
6-5 Forest Folly - Donkey Kong Country Tropical Freeze Guide - IGN