Your dream is rich with symbols and themes that can offer insight into your subconscious thoughts and feelings. Here are some interpretations of the various elements in your dream:

1. Traveling in Portugal: Traveling often represents a journey of self-discovery or exploration of new aspects of your life. Portugal, as a setting, may symbolize a desire for new experiences or a connection to your heritage or family roots.
2. Family and Conflict: The arguments between your mother and the wealthy woman could represent underlying tensions or challenges in your own family dynamics. This part of the dream might suggest that you are navigating conflicts in your waking life, or it could reflect your desire for harmony within your family.
3. Toys and Playfulness: The toys, especially Legos and Angry Birds plushies, represent creativity, imagination, and perhaps a longing for childhood innocence or simpler times. The act of taking the toys might symbolize a desire to reclaim joy or playfulness that you feel is missing in your life.
4. Illusions and Transformation: The woman's ability to create illusions may reflect your own desires to change your situation or to see things from a different perspective. It could also indicate a recognition of how perceptions can shift based on circumstances.
5. McDonald's and Themes: The mention of McDonald's and the themed space could signify comfort or familiarity. Fast food often represents quick satisfaction and indulgence, while the "Inside Out" theme suggests emotional complexity and the importance of acknowledging feelings.
6. The Store and Snacks: The Portuguese American store and the specific snack may highlight a connection to cultural identity or nostalgia. Not being able to buy the new version could indicate feelings of missing out on something important or a desire for new experiences that are just out of reach.
7. Locker Room Experience: Your discomfort in entering the women's locker room might symbolize feelings of vulnerability or a struggle with societal expectations related to gender roles. Choosing the men's locker could represent a rejection of those expectations and a desire to assert your identity.
8. Disguise as Steven Universe: Disguising yourself as a character like Steven Universe dressed as Pink Diamond suggests a desire to express your true self or to embody qualities that you admire. The peaceful resolution at the end of the dream indicates that despite conflicts, harmony can be achieved, reflecting a hopeful outlook on your relationships.

Overall, your dream appears to be a blend of exploring family dynamics, reclaiming joy, and navigating personal identity. Consider what aspects of your life might resonate with these themes and how you can incorporate more playfulness and harmony into your waking life.