If Temple of Sinnoh is in play, can I attach a Rapid Strike Energy from my hand to a non-Rapid Strike Pokemon?
No, you cannot.
Source: TPCi Rules Team (2022-10-06); TPCi Rules Team (2023-04-06)

Relevant cards

Note: All applicable cards may not be listed below.
SWSH10_155
SWSH10_155
SWSH5_140
SWSH5_140