On Pokemon Heartgold is it possible to catch lvl 40 Entei?

You cannot catch a level 40 Entei in Pokémon HeartGold.

Here's why:

* Entei is a Legendary Pokémon: Legendary Pokémon are typically found at much higher levels than 40.

* Entei's Encounter Level: In HeartGold, Entei is found in the following ways:

* After beating the Elite Four: You have a chance to encounter Entei in the Safari Zone, but its level is much higher than 40.

* Using the "Entei Event" code: This code allows you to encounter Entei at a predetermined level, but it's not level 40.

Important Note: The exact level of Entei can vary depending on the method you use to encounter it.