Prompt: Title: Rainbow Gateway Event Card Aspect Ratio: 4:3 Prompt: (magical, whimsical artwork:1.3), create a captivating illustration for a Pokémon event card that depicts the moment you encounter a \"Rainbow Portal\". The visual should evoke feelings of adventure, wonder, and possibility. Illustrate a scene where your Trainer stands at the threshold of an ethereal archway, its frame composed of swirling rainbow hues and surrounded by an aura of sparkling stardust or shimmering light (1.1). Show the Trainer with a look of determination and excitement as they take their first steps into this fantastical portal, leaving behind familiar surroundings (1.2). Incorporate elements suggesting movement and potential rewards, like a glimpse of various landscapes through the portal's colors—a mountain range, a lush forest, or a bustling city—hinting at the unpredictable destination (1.3). Optionally, include a treasure chest or floating item orbs near the portal's exit, symbolizing possible rewards upon arrival. The caption might read: \"Encountering a magical Rainbow Gateway, you boldly step through to be whisked away to another location on the map. This mysterious passage promises not only a change of scenery but also the chance to uncover hidden rewards.\"