Waiting to hear back from you; I spent time doing more evolving of Kanto Pokémon this evening (I'm actually only 21 away from the original 151: eight levelups to Level N, four by stone, three tradebacks, one via breeding, two to import from Soulsilver, and three legendaries - also found in SoulSilver when I bother completing Kanto). It'll be nice to then take some of those and use Heart Scales to restore unlearned moves and evolve them even further, clearing some Sinnoh entries.
In any case, three of my levelups (Hypno, Electrode, Weezing) will be a project sometime Sunday as well as the one breeding (Horsea - which is next in line - plus two more from Johto). I can pull out Raichu (who perennially holds the Light Ball wherever it goes so I don't lose it) while I'm at the daycare and do more nature breeding if the three don't match your request; once I have a match, it'll be ready for you. BTW, did you want Pichu hatched or unhatched?
How about the Nosepass? Alternatively, the DW Riolu sounds good (I already have the normal one from Challenger's Cave, and also from Floccesy Ranch in W2 which was caught at Lv. 5 or 7 or somesuch). Nosepass however is one that stands out among the list as a gap in my Pokédex and would also lead to Probopass.
I'm probably going to be busy for the afternoon, so if I don't have the right nature in my PC already I'll send Raichu to the breeder this evening (might even use Pikachu instead, or both if opposite genders; free experience since I'm worth millions LMAO).