Like countless others, I grew up watching Pokemon, and I decided to make an Alexa game based on our beloved "Who's That Pokemon" game during the TV show.
Two of the biggest challenges I faced were:
1. How do I display an image to the user when Alexa is based on voice-interactions
2. Where do I get the Pokemon images
I solved problem 1 by taking advantage of the Alexa app where you can display customized information in the cards. To solve 2, I used the Pokemon API which includes links to the Pokemon images, albeit they are not silhouettes like the true TV show game. I then used the images from problem 2 and customized the app to display the images.
The results were better than I had expected, and Alexa has been able to understand the names of the Pokemon well enough to successfully play!