Jesus, Wonderwoman, Luke Skywalker, Zeus, Popeye, Good Witch of the North, Morpheus, Aslan, and one more that I cannot remember at this time.
Jimmy/Timmy power hour
Episode 44 Season 2, Episode 18. "Conan Is Kidnapped" -FR
The mystery of Jimmy's retainer is explained in season 5 episode 1 (#53 titled "Every Which Way but Ed")
season 4 episode 16
Season 7 "It's Tricky"
The League of Villains
season 3 episode 20 called "win, lose and kaboom"
Jimmy/Timmy power hour
Episode 44 Season 2, Episode 18. "Conan Is Kidnapped" -FR
The mystery of Jimmy's retainer is explained in season 5 episode 1 (#53 titled "Every Which Way but Ed")
season 4 episode 16
Judgement day season 7 episode 52
Lady Sings
In the episode "king of mars" they express their feelings and in "Lady sings the news" they end up kissing Cindy and Jimmy do like each other. :)
In the English version of Case Closed, Jimmy Kudo meets Sherry (Ai Haibara) in Episode 42 titled "The Desperate Revival." This episode marks the first meeting between Jimmy and Sherry, who plays a significant role throughout the series.
JImmy Rollins
No, but Jimmy Brooks is shot by Rick Murray in the episode "Time Stands Still: Part 2".