Phil and Lil Deville are twins and Phil is like Dil wanting to have his time with Lil never end but Lil like Tommy wants it to end to be with the popular kids.
Tommy: Lil isn't as close with Tommy anymore unlike when they were toddlers. But Phil and Tommy are still friends. Even though Tommy and Lil aren't that close anymore there still friends.
Dil Pickles: he is Phil's best friend and are very close in All Grown Up!, but in Rugrats they weren't that close since Phil was a toddler and dil was just a Infant. Lil liked Dil more when he was a baby but they are still friends.