im trying to get these three egg moves on an elekid:
fire punch
ice punch
cross chop

my female electabuzz has the cross chop, my medicham has the punches. but when i get the elekid in the egg, it has quick attack, leer, fire punch and ice punch. does anyone know how to make cross chop replace one of the first two moves, or why it doesn't show up at all?

You need Machop or its evolutions, thats your problem

The female will never give the baby any moves. Any moves that will transfer to the baby always come from the male.

oh ok thanks. so i will use the new elekid and breed it with the machamp that i got cross chop from. thanks

um no I don't think that will work here's what you should do get a new moveset here's the one I used

-HP grass
-Psychic
-thunderbolt
-Fire Punch

just breed with a medicham that knows fire punch and psychic level up to get thunderbolt and the right EVs for HP Grass, but if you still want that other one

Breed M Machamp with Cross Chop to F Medicham keep going until you get a male Medicham with Fire Punch, and Ice Punch (let it learn Thunderbolt over Thunderpunch) then breed with a female Electabuzz and there ya go

medicham doesnt get cross chop. i think the only way is to put the two punches on a machamp through tutor.

does anyone know how to get encore and perish song on a seel egg?

When you're trying to get moves from multiple pokemon, say a scyther with both Silver Wind and Baton pass, what you need to do is first put one of the moves on someone who can learn the other, like so:

-Male Butterfree learns Silver wind
-Male Butterfree breeds with Female Ninjask
-Male ninjask is hatched with Silver Wind, and later learns Baton Pass
-Male Ninjask breeds with female scyther
-Scyther is hatched with both Silver Wind and Baton Pass

It's the same concept with a Seel I suppose, assuming it doesn't learn either of the two moves on it's own.

i dont think any pokemon learning either encore or perish song through breeding can learn the other through level up. too bad.