>>29705351Giratina has better HP, but Lugia has far better defenses and movepool, on top of Multiscale.
Lugia has an incredible Calm Mind/reflect set. When combined with Multiscale, you have a Lugia that hits like a truck and takes so little damage that leftovers often gets it back to full. It's just simply a better wall than Giratina will ever be.
Give it some better moves and we'd see that change.
