Underdog
Crossovers
Rocky and Bullwinkle in: “Underdog Returns” or “Literal Atomic Dog” by Ek01
In this crossover with Underdog, Rocky and Bullwinkle team up with said superhero to take down the grandchild of one of his old villains, who in turn teamed up with Boris and Natasha.
Crossover - Rocky and Bullwinkle & Underdog - Rated: K+ - English - Sci-Fi/Parody - Chapters: 7 - Words: 2,937 - Updated: 2/18 - Published: 2/10 - Complete
It's a Dog's Life by Evil Little Dog reviews
Talking dogs should probably be the least of their worries, but, there you go.
Crossover - Underdog & Avengers - Rated: K+ - English - Humor - Chapters: 1 - Words: 502 - Reviews: 7 - Favs: 12 - Follows: 5 - Published: 7/31/2013 - Iron Man/Tony S., Hulk/Bruce B., Nick F. - Complete