It is in Viridian City, behind the Poke Center.
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Lance
i do but it is meganium but i breed it for chikorita
the only way is to trade Pokemon with both games. Hope i helped from trainer idiot.
That's not ash its trainer red although he's based off from Pokemon yellow.
In Heartgold and Soulsilver, the House of Memories is in Lavender Town, which is in Kanto, East of Saffron City.