So we have a proof that Sparkle is recessive to Radiant,
Its a bit complicated so bear with me.
Evely sent me a gyazo of a new Sparkle she got today from a Radiant and a blush
Dads Pedigree
Grandad eVe Sunshines pedigree
Proof starter eVe Rocit hides Radiant
lots of pedigrees
Pedigree 1 shows the Sparkle baby
Pedigree 2 shows that Lonnes, the Radiant Dad is the son of a starter Manyia and and OS from Starter Rocit
Pedigree 3 Shows eVe Sunshines full pedigree
Pedigree 4 shows a sibling breed between 2 of Rocits offspring that resulted in a Radiant,
So Lonnes got Radiant from Sunshine and hides Manyias shade
Morgana hides Manyias Shade
their baby is a sparkle so both threw their hidden shade which is Sparkle from Maniya and therefore Sparkle is recessive to Radiant.