Cyndaquil should have evolved in the middle of the Johto saga. Ash's Johto team was generally poor and the lack of evolutions really killed it. The writers tried to improve it by making Heracross a powerhouse when he returned, evolving Phanpy in BF, etc...but the starters are still just kinda there.
I don't think anyone would deny Ash's Johto team was one of his weakest teams of the series. I liked Bayleef, but both Cyndaquil and Totodile should have evolved at least once.
Also, Emmanuel Burnell do you come to every pokemon forum in existence?