well if you mean that you want it to evolve into a luxray then you can pretty much just train your level 23 luxio anywhere until you have been satisfied with the experience that it has been making
get rid of some of your team because you can find them at a higher level then train the Pokemon u really want when you train Pokemon, at the start just train your starter. When it evolves to final stage, use the EXP share (which u can get quite early) to train other Pokemon. For exmaple, i defeated Fantina with a Lv. 35 Prinplup that evolved to Empoleon after the match. My other Pokemon were Lv 25 budew and Lv 22 Luxio. After the battle, i began using the EXP share. So if i were u, I'd start again...
23.
Iron Isle
Train it to level 23.
Shroomish > lvl 23 > Breloom
Look at the dates when Pokemon Diamond,Pearl and Platinum came out. Diamond and Pearl came out in April 23, 2007. Platinum cam out in March 23, 2009. So I think it is coming in May 23, 2009. I'm prombaly right.
im not sure but i will probaly be about lvl 16-23
Use PokeRadar on Route 224. There is a 2% chance and the Duskull will be level 23.
its Iron Tail I Think you can find it in iron mountain but i havent yet hehe
not sure... shroomish evolves at lv.23
If your DS is set to the date/time of your location, it will go by that. Lets say it is June 23, a Tuesday in your location, then it will be Tuesday of June 23.
I would suggest getting a Leafeon.