To achieve 100% completion in Super Mario Bros. Wonder, players must navigate a variety of mechanics and challenges, focusing primarily on collecting Wonder Seeds, unlocking secret exits, and tackling the Special World stages. Here’s a comprehensive guide on how to successfully unlock every stage and obtain 100% completion:

Unlocking All Worlds and Stages

1. Collect Wonder Seeds:
– Primary Objective: Your journey begins with the collection of Wonder Seeds, which are essential for progressing through the game. You need a specific number of these seeds to unlock each subsequent world and ultimately access the final area for the climactic boss battle.

2. Complete Each Stage Fully:
– To ensure access to the later stages of each world, you must:
– Collect all three big coins found within each stage.
– Reach the top of the flagpole at the end of each stage.
– Completing these objectives not only earns you more Wonder Seeds but also makes the final stages of each world accessible.

Unlocking the Special World and Its Stages

1. Understanding the Special World:
– The Special World is a unique set of levels characterized by increased difficulty and tougher challenges beyond the main game.
– There are nine Special World stages:
– Seven are accessed via special flower petal portals hidden throughout each of the seven main worlds, including Petal Isles.
– The last two are unlocked by collecting Wonder Seeds specifically within the Special World.

Finding Special World Entrances

1. Identifying Portals:
– Each main world map contains secret entrances to Special World levels, presented as propeller flower portals.
– You’ll often need to uncover secret exits to gain access:
– For instance, in certain levels, activating the Wonder Flower effect and utilizing Elephant form to break blocks near the Wonder Seed can reveal secret exits that lead to the portals.

2. Completing Challenges:
– Completing expert badge challenges or specific level requirements can also open up extra entrances to the Special World stages. A notable example is the challenge applicable in Fluff-Puff Peaks in World 2, which requires finishing the “Jump! Jump! Jump!” challenge and completing an Expert Badge Challenge.

Progressing in the Special World

1. Collecting Wonder Seeds:
– Focus on gathering Wonder Seeds throughout the Special World stages to unlock further hidden content within that area.
– Collecting all Wonder Seeds within the Special World ultimately grants you access to the Final Test Wonder Gauntlet, the most challenging stage in the game.

Additional Tips for Success

1. Linking Petal Islands:
– To access some final entrances to Special World stages, players should aim to link all Petal Islands. This can involve completing specific challenges, such as the Wiggler Race Spunking challenge outside Deep Magma Bog.

2. Complete All Goals for 100%:
– Ensure that you finish all levels in the Special World, including the Final Test Wonder Gauntlet, to achieve true 100% completion status.

Summary of Steps to Achieve 100% Completion

1. Complete all main stages, ensuring to collect all big coins and reach the top of the flagpoles.
2. Gather enough Wonder Seeds in all worlds to unlock new areas and engage in the boss fights.
3. Search for secret exits to reveal Special World portals present in each main world.
4. Tackle expert challenges and select levels to unlock additional entrances to the Special World.
5. Collect all Wonder Seeds within the Special World to gain access to hidden stages and the final gauntlet.
6. Finish all Special World levels and the Final Test Wonder Gauntlet.

By adhering to these guidelines, you can successfully unlock every stage in Super Mario Bros. Wonder and achieve 100% completion on the world map. Happy gaming!