Challenge 21 - How Common is this Pokemon

<p><strong>Challenge 21: How Common is this Pokémon?</strong></p><p><strong>Level:</strong> Medium</p><p><strong>Description:</strong> Recently you have been feeling a bit nostalgic about Pokémon, and decided to use the <strong>PokeAPI</strong> to check which of them are the most common these days. Through the API, find the the occurrences of each Pokémon, filtering out all irrelevant information along the way. What are the five most common Pokémon types?</p>