Firstly, most, if not all of these music are adapted or taken from MIDIs, or both.

I don't mind people stealing or using them actually since I'm not really on the same server and also, everyone should share in the joy of it. Also, if these songs are overplayed, it just means that there should be better songs rolling in to make other people happy. I'll put in some videos too if there are any of those songs.

Dvorak's Slavonic Dance No. 7/Dragon Slayer GB Overworld (Rank 4)

(Play this with flute, it's awesome (= )

YouTube - Mabinogi Performance - Dvorak's Slavonic Dance No. 7/Dragon Slayer GB Overworld (Rank 4)

Code:
MML@t80ro6d8<g8l16aa+g8>d8<g8aa+g8>c.d32c<a+agf8>c.d32c<a+agf8a+.b+32a+agfd+8a+.b+32a+agfd+8gfd+8gfd+8dc<a+8>dc<a+8b+8a4.>>d8<g8aa+g8>d8<g8aa+g8>c.d32c<a+agf8>c.d32c<a+agf8a+.b+32a+agfd+8a+.b+32a+agfd+8gfd+8gfd+8dc<a+8>dc<a+8b+8a4.>a+.>d32<a+.>d32<g.a+32g.a+32d+.l32gd+fl16gdc<a+8>a+.>d32<a+.>d32<g.a+32g.a+32d+.l32gd+fl16gdc<a+8l32>a+.>cd.<a+.>cd.<g.aa+.g.aa+.d+.fg.d+.fg.d.dc.<a+8>a+.>cd.<a+.>cd.<g.aa+.g.aa+.d+.fg.d+.fg.d.dc.<a+8,r2>d8<g8l16aa+g8>d8<g8aa+>c.d32c<a+agf8>c.d32c<a+afgaa+.b+32a+agfd+8a+.b+32a+agd+d+8gfd+8gffd+dc<a+8>dcl8<a+b+aa+4.>>d<gl16aa+g8>d8<g8aa+>c.d32c<a+agf8>c.d32c<a+afgaa+.b+32a+agfd+8a+.b+32a+agd+d+8gfd+8gffd+dc<a+8>dcl8<a+b+aa+>>dc<a+agcf4>dc<a+agcf4l16a+>d<a+>d<ga+ga+d+gcd+df<a+8>a+>d<a+>d<ga+ga+d+gcd+df<a+8,rl8<g>d<g>d<g>d<g>d<fb+fb+fb+fb+d+a+d+a+d+a+d+a+d+a+d+a+<a+>f<a+>fad<ad>g>d<g>d<g>d<g>d<fb+fb+fb+fb+d+a+d+a+d+a+d+a+d+a+d+a+<a+>f<a+>fad<adl16>>ga+ga+d+gd+gcd+<fb+<a+>a+<a+>a+>ga+ga+d+gd+gcd+<fb+<a+>a+<a+>a+>g<g>f<f>d+<d+>d<db+c>f<fa+<a+>a+<a+>>g<g>f<f>d+<d+>d<db+c>f<f<a+>a+a+a+;
Harry Potter GBC game opening theme (rank C)
Code:
MML@l16r>afaa+8f+a+a8def4&ffdff+8d+f+f8<a>c+d4&dec+ef8dfg8ega4&aec+ef8dfg8.ea4.&a<a>d<a4&aa+>d+f+d+<a+8.dfa>d<afd8egb>ec-ge8eg+>c+ec+<g+ee<ga+>ec+<aea>e<ga+>c+<aea8l4defgl16a+4&a+agaa+4&a+g>d+8d8.dc+<g+f>c+c<aeb+bf+d+ba+fda+>d<a+>fded<a+>dfd<a+>d<fegfedec+fegfedec+,t72r8aa+a8.a&a16af+f8.l16fed8.e4f4g8.efg8.e4f4g8.a>c+e8<dfdfdfd8f+d+f+8f+d+f+8<a>dffd<af8gb>egebg8eg+>c+ec+<g+e8c+eg8ec+8<a+>c+eg8c+2&c+8<a2a+4>d2dd+8.a+8afd8.c+8.<ab+8.f+b8.fa+8>d<a+>fde<a+>fd<a+>dfd<aga+agfgeaga+agfge,l8<dfdf+dfdf16e16df<a+>d+<a>d16e16d4<a>c+<a>d<a>e<a4a>c+<a>d<a>e.l16<a>c+e<d8a4afa+4.&a+a+f2e2>c+2<a+4a8.aa4a8aa8dfa8<a>c+e8dfa8<ga+>d8dfa4.ga+4ga+8f+a8fg+8fe8.ed+8.d+d8.f4&fa+8.a+e8e8l4dddd8.;
You are my sunshine (I released this at Nexon Composer too, rank D)
Code:
MML@r1<gl16e4.&ege4b+4e8.g4b+e2e4.&ege4>e4<e8.g4b+e2f4.&fa4&a>c4.&c<f4a2&ae4.&ege4b+4e4.&eeg8.>c4&c<f4.&fa4&a>c4.&c<f4a4&ag4e4.&ege4b+4e8.g4b+e4>d4<f8.g4bf4>f4<f8.g4bf2e4.&ege4c1<f4>f8.a4b+f2f4.&faf4c4e8.g4b+e2e4.&ege4<g4>g8.b4>d<g2g4.&gbg4c4e8.g4b+e4c4e8.g4b+e4<f4>f8.a4b+f2f4.&faf4c4e8.g4b+e2e4.&ege4<g4>g8.b4>d<g2g4.&gbl4g<g>g8.b>d16<gc2.&c8.,r<g>cde2e2.ed+ec2c2.cdef2a2.agfe1&ecdef2a2.agfe2c1cde2.fd2dec1&c2c<ba2>c2f2.ced+ec<g2.>cdc+d<bg2.>ded+edccc<ba2>c2f2.ced+ec<g2.>cdc+d<bgg>dfe2d2c2.&c8.,r1l2<c<gb+gb+gb+gl4fb+ab+fb+a>cl2c<g>cdl4<fb+ab+fb+a>cl2c<gb+gggggb+gb+1fb+f>ccgcg<g>d<g>dcgeg<fb+f>ccgcg<g>d<g>dc<g>c.&c8.;
Mabinogi's Falling Down Song (part of it inspired by Pan's composition in Lorna and Pan series) rank 5

YouTube - Mabinogi Performance: Knock down song (incomplete)

Code:
MML@t105o2d+1l16<a+>d+g+a+a+>d+g+a+a+>d+g+a+a+>d+g+a+l32ba+ba+ba+ba+ba+ba+ba+ba+ba+ba+ba+ba+ba+1&a+8.&a+l4o2ff+>d+g+l2dfl8<d+>d+<f+2fg+d+>d+<f+2fg+d+>d+<f+2fg+d+>d+<f+2fg+d+>d+<f+2fg+d+>d+<f+2fg+d+>d+<f+2fg+d+>d+<f+2fg+fg+c+f4.f4d+g+c+d+4.d+4d+>d+<f+2fg+d+>d+<f+2fg+d+>d+<f+2fg+d+>d+<f+2fg+d+>d+<f+2fg+d+>d+<f+2fg+fg+c+f4.f4d+g+c+d+4.d+4d+g+d+f+4.f+4d+g+d+f+4.f+4fg+c-4d+2c-d+dd+f2dfd+ff+2d+f+d+a+f+2d+ff+g+f+2d+fdd+f2f+fdd+e<a+4>dd+ff+g+4d1&d4&d16,l1<f+&rrrr<d2a+2rrrrl8a+d+a+2c+fa+d+a+2c+fa+d+a+2c+fa+d+a+2c+f>c+c+c+2<c+f>c+c+c+2<c+fa+d+a+2c+fa+d+a+2c+fa+d+a+2c+fa+d+a+2c+fa+d+a+2c+fa+d+a+2c+f>c+c+c+2<c+f>c+c+c+2<c+fa+d+a+2c+fa+d+a+2c+fo5d+1l2fg+a+<a+1>f+d+1d+c-4.g+8g+ffd+4.l16fd+d2a+1&a+4.&a+,l1<a+&rro6d+2l4.<g+f8f2d+l16fd+l1d&rrr.l8<<a+b>d+ff+2f+4.fd+2<a+g+>d+ff+2f+4.g+d+2f+4f4c+2g+4.a+b2>c+4.<g+a+1&a+2<a+b>d+ff+2f+4.fd+2<a+g+>d+ff+2f+4.g+d+2f+4f4c+2g+4.a+b2>c+4.<g+a+1&a+1d+ff+a+b2l4>fdd<a+>f2<f+g+g+a+a+2.f+l2bf+>f.&f8d+8d<fa+>f.&f8.;
Tetris Type A, also released on Nexon Composer, rank F

YouTube - Mabinogi Performance - Tetris Type A Song

Code:
MML@l8o2e>e<e>e<e>e<e>e<a>a<a>a<a>a<afg+>g+<g+>g+<e>e<e>e<a>a<a>a<a>a<c-cd>d<d>d<d>d<d>d<cb+cb+cb+cb+g+>g+<g+>g+<e>e<e>e<a>a<a>a<a>a<ag+e>e<e>e<e>e<e>e<a>a<a>a<a>a<afg+>g+<g+>g+<e>e<e>e<a>a<a>a<a>a<c-cd>d<d>d<d>d<d>d<cb+cb+cb+cb+g+>g+<g+>g+<e>e<e>e<a>a<a>a<a>a<ag+aaaaaaaa<ee>ee<eeee>aaaaaaaa<ee>ee<eeee>aaaaaaaa<ee>ee<eeee>aaaaaaaa<ee>ee<eeee>ee>ee<eeee<ee>ee<eeee>ee>ee<eeee<ee>ee<eeee,>el8c-cd4c<ba4a>ce4dcc-4.cd4e4c4<a4a2&a>d4fa4gfe4.ce4dc<b4b>cl4dec<aa2>ec-8c8dc8l32c-c16<ba4l8a>ce4dcc-4.cl4dec<aa2&a8>df8ag8l32fg16fe4.l8ce4dc<b4b>cl4dec<al2aecdc-c<ag+l1b&b&b&b&b&b&b&b&b2,l1<e>ag+2<e2>a>dcl2<g+<e>a1ebab+g+<e>a>adf>e1<g+<el1>a&a&a&a<c-al2>d<g+>c4e4a<e1e1>ec-d1e1;
Song of secret garden, I finally decided to release this because it is such a nice song. Rank E.

YouTube - Mabinogi Performance - Song of Secret Garden

Code:
MML@r1<cg>d+2<<f>cg+2<a+>f>d2<<d+a+>g2<g+>d+b+2<f>c>g+2<<g>dgab2.>f<cg>d+2<<f>cg+2<a+>f>d2<<d+a+>g>d+<<g+>d+b+2<f>c>g+2<cg>cdd+1<<g+>d+8.&d+32>cl32d4&d<<a+8.&a+>f4>d4f4&f<<g4>d8.&da+4>d4&d<c8.&cg4>d+4g4&g<<f4>c8.&cg+4>c4&c<<a+8.&a+>f4>d4f4&f<<d+4a+8.&a+>g4a+2.&a+g4a+4c8.&cg4>c2&c<<f+4>d8.&df+4a4&a<g4>d8.&da+4>d4&d<c8.&cg4>e4g4&g<<f4>c8.&cg+4>c4&c<d8.&dg+4>c4d4&d<<g4>d8.&dg4a4&a16b2.&b8.&b>b+gd+c2.&c16.,rg>cdd+2.dd+1d+fdcd1dd+c<a+b+2.a+g1&gg>cdd+2.dd+1d+fdcd1dd+c<a+b+2.a+>c1&cdd+a+>c1cd<a+g+a+16g+16a+1&a+8dd+gg+1&g+a+gfg1&gdd+a+>c1&cd<a+aa+1&a+b+g+gg+1&g+a+gfg1&g1l32<cd+g>c2.&c16.,l1r<c<fa+d+g+fg&gb+fa+d+g+fc&cg+a+gb+fa+d+&d+b+f+gb+fdg&g>c2.&c8.;
Gymnopedie No. 1 (Rank F)

Code:
MML@t87l1rrrl4r>f+agf+c+c-c+d<a2.f+1&f+1&f+1&f+>f+agf+c+c-c+dl2.<a>c+f+<e1&l4e1&eab>cedc-dcc-d1&ddefgacdedc-d1&ddg2.f+2.<bab>c+dec+del2.<f+>cl1d&d&d&dl4f+agf+c+c-c+d<a2.f+1&f+1&f+1&f+>f+agf+c+c-c+dl2.<a>c+f+<e1&l4e1&eab>cedc-dcc-d1&ddefgacdedc-d1&ddg2.f2.c-cfedcedcl2.<f>cd1&d4.&d32.,rl2.f+f+f+f+f+f+f+f+f+f+f+f+f+f+f+f+f+f+c-gdeeeddfeeddgf+f+aad4g4aa1f+f+f+f+f+f+f+f+f+f+f+f+f+f+f+f+f+f+c-gdeeeddfeeddgafaad4g4aa1&a2,l2.o2gdgdgdgdgdgdgdgdf+c-eed<a>dddddddddef+c-eee>gd<gdgdgdgdgdgdgdgdf+c-eed<a>dddddddddeeeeee>gd1&d2;