Jenny is Wendy's sister. Jenny acts flirtatious around Bob sometimes. She has shorter and lighter blonde hair than Wendy does. She appears in some episodes and was first mentioned in Bob's Big Surprise though her name wasn't mentioned.
- Season 2 - Bob's Big Surprise (mentioned)
- Season 5 - Wendy's Surprise Party, Bob of the North
- Season 6 - Lofty And The Giant Carrot (mentioned)
- Season 7 - Dizzy Goes Camping
- Season 8 - Ballroom Bob (cameo) and Molly's Fashion Show (cameo)
- Season 9 - Spud and the Statue (cameo), and Scoop the Disco Digger