Ruling Latias

[SheNinja]

Latias
Latios ex

My question is, are the suffixes, Delta, ex, EX, Lv. X, or LEGEND part of the Pokemon's name? This would apply to Latias' second attack: If Latios ex or Latios EX were on your bench, would the attack heal Latias?

 

[Cobalt Phoenix]

Latias
Latios ex

My question is, are the suffixes, Delta, ex, EX, Lv. X, or LEGEND part of the Pokemon's name? This would apply to Latias' second attack: If Latios ex or Latios EX were on your bench, would the attack heal Latias?

Latios EX/ex are not the same as Latios. You would not be able to heal Latias with its attack. The suffixes are part of its name.
EDIT: That's the reason one can have 4 Latios and 4 Latios ex in the same deck!