Terapagos' "Prism Charge" attack can attach energy to "Tera Pokemon", but can I attach that energy to this Terapagos?
No, although Terapagos' *category* is literally "Tera Pokemon" that doesn't count for the purposes of this attack which only counts for Pokemon with the "Tera Pokemon" attribute.
Source: Surging Sparks FAQ; TPCi Rules Team (2024-11-07)

Relevant cards

Note: All applicable cards may not be listed below.
SV8_161
SV8_161