Your search for "Voltorb - 238/190" revealed the following:
Voltorb (Japanese) - 238/190 - Shiny Rare from SV4a: Shiny Treasure ex, available at 401 Games Canada. Rarity: Shiny Rare Finish: Holofoil Card Text:[Lightning] Tumbling Attack (10+)Flip a coin. If heads, this attack does 20 more damage.
Voltorb (Mirror Holofoil) (Japanese) - 057/190 - No Rarity from SV4a: Shiny Treasure ex, available at 401 Games Canada. Rarity: No Rarity Finish: Mirror Holo Card Text:[Lightning] Tumbling Attack (10+)Flip a coin. If heads, this attack does 20 more damage....
Voltorb (Japanese) - 057/190 - No Rarity from SV4a: Shiny Treasure ex, available at 401 Games Canada. Rarity: No Rarity Finish: Normal Card Text:[Lightning] Tumbling Attack (10+)Flip a coin. If heads, this attack does 20 more damage.