Training Daze
Unfortunate scheduling meant that this special about Team Rocket aired between two consecutive episodes with a story arc focusing on Misty and Togepi.
As it begins with Team Rocket already in the middle of a blast-off, it makes more sense to place it just before the Togepi arc, as while the preceding episode concludes with them blasting-off, the Togepi arc sees them escape realtively unscathed.
Source: Bulbapedia