Echoes with matchups like this shouldn't be possible.

because Rover can easily switch between Spectro and Havok?

Because if you got what you wanted every single time, whats the point? its there to prolong the gameplay, and make you work for it, and also where's the satisfaction if you dont even have to try for anything? its another layer of gacha inside a gacha, and if you dont like gacha, what are you even doing here?

you are not lucky, it is possible to get it