I made a simplified weakness chart that my 4-year-old is using

Battling - Pokemon Fire Red and Leaf Green Guide - IGN

Pokémon type chart: strengths and weaknesses

Pokémon type chart: weaknesses, strengths, resistances

Vertical Type Chart for Gen 6+ : r/pokemon

Print this Pokemon X & Y weakness chart – Destructoid

Co-occurrence of Pokemon Types (Gen 1-6) with Chord Diagrams - Data Crayon

The Pokedex of Data

Minimalistic Pokémon Type Chart! Was too frustrated with

Easy to read Type Effectiveness chart for newer players. Easy to

Pokémon type chart: Pokémon Scarlet and Violet strengths and weaknesses - Polygon