You don't catch them. Those two are "ghosts", representing the people who used to live in the house. They aren't a graphical issue, as some people will most probably have thought, but you cannot interact with them, either.
Hypothetically, one could use the Walk Through Walls AR code in conjunction with a data lock sequence to be able to stand next to them, but as they have no lines programmed, it's likely that they would not say anything but glitchy block letters if spoken to, if they respond at all. Add that to the fact that a data lock sequence would make eveything else in the game completely immobile, and it doesn't seem worth your while to even try to catch them.
You can catch a Rotom at night by talking to the tv
you can catch a pikachu in the Pokemon mansion.
on the roof
you cant catch ditto in the safari zone...you catch him in the Pokemon mansion in cinnabar
Either train a Koffing or catch one in Pokemon mansion which is located on Cinnibar Island.
You can catch a Rotom at night by talking to the tv
you can catch a pikachu in the Pokemon mansion.
You can catch a Growlith in the Pokemon Mansion on Cinnabar Island.
You can catch a Krickitot at Mr. Backlot's Pokemon Mansion in the Trophy Garden.
in the pokemon mansion lvl 30 ditto
You'll need to catch it from Trophy Garden in the Pokemon Mansion.
go to the mansion garden
In the Pokemon mansion but only in fire red
In the pokemon mansion or in the route that leads you from Vermellion to Fuschia
Growlithe is found in the Pokemon Mansion on Cinnabar Island in Pokemon Firered.
You can catch Pikachu In back of the Pokemon Mansion Down from hearthome city.Also You can catch Pichus.
Go to the Pokemon mansion and he will be in the trophy garden.