He Summoned it six times after gaining Neos. (Incidentally, this is the same number of times he used Miracle Fusion in that same period.) I wouldn't call that him stopping using it. He used it more than cards like Neo-Spacian Dark Panther and E - Emergency Call.
Jaden yuki ace monsters was these:
Season 1-2: Flame wingman/shining flame wingman
Season 3-4: Neos
Manga before reggie: Terra firma
Manga later reggie: Contrast hero chaos